It's the kind that slides into the wall. When I try to fix it one side of the rollers get on track, but then the other one doesn't. I think one of the metal piece that hold the roller is bent, how can I bend it back so it's straight? Also, I don't want to have to break the wall to fix the door. If I really have to, then who should I call to come and do this, how much is it going to cost?
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