Hi,
I'm in the same situation, I finished 1st in my friendly championship and I couldn't recover the crest and the jersey and now the next championship has started...
I contacted support on Monday but no response, they don't really care since we are isolated cases.
I have an explanation of the problem: one of Friday's matches was not counted which leaves the championship probably unfinished causing this new bug...
I really hope the support gives us back these rewards, I won't stop there!