nver Buying SanDisk again - defective 128GB card wont replace

Card is failling with vanishing and corrupted files.  Support will not replace claiming it is fake because I got it on ebay, but packaging is 100% authentic from 100% NY seller and matches Amazon’s pictures.

Chat Transcript 02/09/2015 10:19 AM
Hello, thank you for contacting SanDisk. My name is Ryan K.. Please give me a moment while I look into your question.
Ryan K.: Please tell me what is written on the face of the memory card?
Jesse Karol: SanDisk Ultra 128GB MicroSD XC1 with a circled 10.  all in red
Ryan K.: Thank you for this information.
Ryan K.: Is this card not being recognized at all or do you get any error message?
Jesse Karol: files are vanishing, or show in android with corrupted file names.
Ryan K.: What is the make and model of the host device on which you were using this card primarily?
Jesse Karol: samsug galaxy s4
Ryan K.: Please tell me from where did you purchase this card?
Jesse Karol: an ebay seller from ny with 100% rating
Ryan K.: Jesse, please help me with the product code written on the back of the card.
Jesse Karol: its a micro with nothing on back
Ryan K.: Jesse, according to the information you have provided it appears that the card is not an authentic SanDisk card, however, in order to make the final judgment we will need to review the pictures.  Please send us clear and zoomed in pictures of both the front and back in order to validate the authenticity of the card.
Jesse Karol: wait there is something barely legable on the back
Ryan K.: I can understand Jesse. Incase the code is not visible please help me with the clear front and back picture of the card.
Jesse Karol: CCEGW1B81408 TW - took a flashlight to see this tiny code
Ryan K.: Jesse, this is not an authentic SanDisk product code. It should start with numeric code only. I would request you to contact the place of purchase for the replacement of  this card.
Ryan K.: Also I want to tell you that Ebay is not an authentic SanDisk reseller.
Ryan K.: If you can send the copy of the original receipt of purchase along with the link for the online store where this product is advertised, we will forward  this information to our brand protection department for taking appropriate action against the seller.
Jesse Karol: let me upload a pic of the packaging which looks athentic to the official packackaging as sold dirctly by amazon.com
Ryan K.: I can understand but we can only check the authenticity with the help of product code written on the back of the card.
Ryan K.: Are you still with me, Jesse?
Jesse Karol: <a href="http://tinypic.com/r/2mmagxk/8&quot; target="_blank">http://tinypic.com/r/2mmagxk/8&lt;/a>
Jesse Karol: <a href="http://tinypic.com/r/34g1ys3/8&quot; target="_blank">http://tinypic.com/r/34g1ys3/8&lt;/a>
Ryan K.: Thank you for this information.
Ryan K.: I will forward these details to my brand protection team so that then will take actions against this reseller.
Ryan K.: You can purchase SanDisk product at online SanDisk store or Amazon.com in future.
Ryan K.: Moreover you can check our nearby authorizes retailer using below link and contact them too as well for any SanDisk product:

http://www.sandisk.com/about-sandisk/find-a-retailer
Ryan K.: Is there anything else I may assist you with?
Jesse Karol: <a href="http://www.amazon.com/SanDisk-Ultra-UHI-I-Class-Memory/dp/B00M562LF4/ref=sr_1_1?ie=UTF8&qid=1423505588&sr=8-1&keywords=sandisk+128" target="_blank">http://www.amazon.com/SanDisk-Ultra-UHI-I-Class-Memory/dp/B00M562LF4/ref=sr_1_1?ie=UTF8&qid=1423505588&sr=8-1&keywords=sandisk+128</a>
Jesse Karol: looks identical
Jesse Karol: except newer model
Jesse Karol: adapter matches
Ryan K.: I can understand Jesse. But as the code given by you this card is not an authentic SanDisk card so you can replace this card directly at the place of purchase, however, you will also receive an email as well with same details after disconnection of this chat.
Ryan K.: Is there anything else I may assist you with?
Jesse Karol: screw you
Ryan K.: I apologize Jesse I can understand the inconvenience. I would love to assist you but as this card is not an authentic card so I would not be able to assist you further.
'Jesse Karol' is currently 'Absent'. Approximately 180 seconds until disconnect.
Ryan K.: Are you still with me, Jesse?
Ryan K.: We are not getting any response from your end, please acknowledge or we will disconnect the chat.
Ryan K.: As we are not getting any response from your end, SanDisk is disconnecting this chat. If your issue still persists please contact us again.
Ryan K.: Thank you for contacting SanDisk, and you have a great day, Jesse.
'Jesse Karol' disconnected ('Concluded by Agent').

Thank goodness seller is happly offering a refund.

As they verified the card was counterfeit by the serial number you gave them, did you really expect a different response?