Help! Only some of the photos and videos are able to be viewed - the rest get error message...

Is there a current problem with 32 Gb Sandisk Micro Ultra cards?

I installed a 32GB Ultra micro SD card into a Tablet on 11 Sept 2016.  It start to fail after 30 days.  Only 5 Gb of the 32 were in use.

Desperate to recover precious and irreplaceable photos, I got assistance from local IT Coy;  They state Sandisk card memory was corrupting as they worked.  In old fashioned speak, it was a mass of damaged data pkts.

Retailer won’t even replace the SD card claiming I have to prove to them I didn’t damage the card.