2 months to repair a car with no feedback

They have had my vehicle since the 9 December. Apparently a door couldn't be found, after multiple phone calls with no feedback from thier side. On the 25/01 they notified me that a door was scheduled to arrive by the afternoon, but unfortunately could not give me an estimate time of completion because the door and the frame had to be alligned and this could take some time, but once this was complete they would update me with a time frame. Still nothing, its completely unacceptable!