Happened the same to me, but in your case is more painful, in my case was directly the very first match, round 1 level 1. Won the game and after the game and not getting the reward, the match disappeared and I was back to the starting point. So defo they have a bug there.

I already reported it to Lian and also in the (?) In the game, but as you said, the problem here is the response time, I reported it this morning (played like an hour or two right after the cup began), haven't heard anything since...