Hello, what should I do when an opponent goes AFK in a PvP battle and refuses to lose? I waited for 20 minutes, sent greetings to all his relatives, and shared my opinion on their future reproduction – no reaction. I have screenshots of him being AFK with the time of his absence. The game is, of course, ranked; otherwise, what's the point?
Here is a description of how to report unfair players. It doesn't always work, but it's worth a try.