Cannot format micro sd, believe me, i tried everything

Hello All

I´m both glad and sad upon seeing this. Seems like a common problem? I have run my 64GB micro-SDXC in my Xperia Z5 without any problems for 1yr+. 

All of a sudden, while in a call the phone froze and was totally unresponsive. I removed the card and phone works fine. However I cannot format the Card? I´ve tried through varios electronics (camera, phone) as well as my Mac and Win 7 Computer. Including the software SD-Formatter. 

Just contacted Sandisk support by mail. We´ll se what happens. 

Or has anyone found a sollution for this?