Phone micro SD 512g with roughly 250g of pics and videos gone RAW... HELP !!!

I have a Gigastone micro SD 512g with roughly 250g of pics and videos gone RAW... I have most of it backed up on another drive but I would love to recover the data. I've tried multiple recovery programs but they find a small fraction of the files. Gigastone's 5 year data recovery apparently doesn't apply to this model SD card.