Sold an 4TB Sata SSD, buyer wants a refund. But the person I am selling it for refuses to give the money back for the SSD that i zelled him...

Platform: Offer up

Context: The seller of the SSD brought a PC from me and asked me to sell his old PC. I parted most of it out. Someone picked up the 4TB Sata SSD from me and after he left. I paid the seller with the full amount. But now after the buyer got home the SSD turns out to be broken or detected by windows but crystaldiskinfo(Does not display) and disk genius(bad sectors). I used crystaldiskinfo the check it, It said 4TB, 99% health and only 100GB total r/W. After i asked the seller about it, he refused to refund him. Quote on quote "I think he is just trying to scam us"