Okay, when you're having issues with an SD card not formatting, I always try the following steps first. Open powershell or cmd prompt in admin mode then try:

diskpart

list disk

select disk

clean

create partition primary

format quick

Then give it another go. This will often resurrect dead drives/cards/USB sticks or reset them back to their old capacity when it displays wrong.

I would try again with another SD card, if I had one.