I would at least get someone to write a letter. That much isn't expensive and there's always a chance they'll give in at the first sign of legal trouble. If th

I would at least get someone to write a letter. That much isn't expensive and there's always a chance they'll give in at the first sign of legal trouble. If that doesn't work though, and the amount isn't worth a legal fight, I don't know if there's much you can do, sorry :/