You bought a specific seat, that you can check on ticketmaster or at the box office to see if it is obstructed view. Was it? House managers say all kinds of things but obstructed view tickets are marked as such. If they were not marked as obstructed, that's on the producer, without regard to what the house manager (or you) thought was "restricted." Had the tickets been marked, and the seller had not disclosed that, Stubhub would have backed you up.
