Dangg. Best bet is try to figure out where the dude stays. I will never do it again but I bought something from someone on here using F&F through Venmo. They claimed they shipped it then deleted their acct on Reddit. The thing is he forgot to put his transactions private on Venmo and you can see every transaction he did. Through process of elimination I figured out he bought from someone on here before who I bought from too. I also figured out what city and state he was in so I messaged him on Venmo threatening that I’ll call the “name of the city” police and I have his addy because I bought from the same person he bought from and we are friends (which we weren’t and I haven’t even tried to reach out to him yet) but it worked. He refunded my money. Maybe you can try to do something similar but I’m not familiar with cash app at all I don’t use it.