For context, I (30F) was with my ex (35M) for 3 years. Recently, I caught him cheating with a girl he met at work. We live in different countries. He's from USA and I'm from Europe. During our entire relationship, he would borrow money from me when he gets into a tight spot. Of course, I, as a loving girlfriend, couldn't just let him get hungry or sick so I let him borrow money from me. When he would come to visit, we would book tours and trips which he promised he would pay his part. When he had the money, he did pay me back. But at the end of last year, he got into some problems with work so he got laid off for a few months which resulted in him borrowing money from me.
When I caught him cheating, he promised me he would pay me his debt. I got it in recording. He even got his family involved in promising me that he would pay me back.
Fast forward to a month from that incident, him and his entire family are not responding to my messages anymore. They haven't blocked me on social media but I know they are deliberately ignoring me.
How do I get him to pay up or how do I put pressure on his family to pay me?
Is there a way I can go after him even if I'm not from USA?
I have all the receipts, voice recordings, messages, bank transfers and etc.
WIBTA if I post about what happened and tagged his entire family?
Reddit, Please help me.