Sd card seems to be completely dead. Please help

I have had my 64gb SanDisk ultra sd card for around a year and 4 months now, and it was first used in my old Chinese Cubot phone, which was also the last use. As when that phone eventually died the sd card seemed to at the same time. I went to back up some of the data from it then format it, but I could not copy or format from it. It was and still is readable, in a Fat32 format and I can view pictures from it and so on. But whatever I try I cannot do anything to crack it. So far I have tried recovery software, cmd, diskpart.exe, Using macOS, putting it into another android phone, and so on. But no success. When I try to delete any files they reappear after a refresh. I would love to get it to working health again as It cost a fair amount

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