Eternal debtors

Positive player. We agreed on a bet on the Jebus template, only a symbolic 400 rubles. He spent a lot of time, it was already the end of the 3rd week. He says that he won't give me the money until I play a rematch with him. I wrote to him that it's my business whether to play a rematch or not, and that we agreed on 1 game, and I don't see the point in playing 2 until he pays up. He doesn't want to pay the debt.