Extremely Poor Feedback and Late Delivery

I handed my car for repairs at Renew-it on the 8th January. Initially it was handed to hale repair specialists then after a week it was handed to Renew-it to do the balance of the work. According to their own website work should of been concluded on the 8th February 2016. I phoned on several occasions and was promised someone would phone me back. Never received any call backs. I then personally went to the shop and was assisted by Lana (this is nearly two weeks ago), Lana was initially helpful but it rapidly went backwards again with feedback sometimes received from an email I initiate other times no feeback. The car has supposedly been at final inspection for well over a week now. Feedback two days ago was they were waiting for a new rear taillight. They found the one on the car had a crack. When I said I would take the car in the interim I was told they would come back to me. A follow up mail done yesterday has not been rep**** to. I have never come across such poor service on vehicle repair before. It seems they have too much work to do. If they carry on like this they soon will have no work to do.