I also am stuck on this map. I think it's the same match.
Logged out for 5 minutes before logging back in, I am put back into the finished match.
I can switch character to not be in PvP, but when I switch back I get thrown back into the match.
Trying to leave the match loads heart of the mists before putting me back into the match.
Trying to join a PvP server does the same, so does trying to enter my guild hall.
Would like to get out now :(