Bad service from both Hofbro Auto Body and Discovery

My car was authorized for minor repairing by Discovery. First I was told that repairing would last about 5 days. Car was booked by panel Beater for repairing on 24 of July When I brought my car on 24 of July I was told that it would take 8 working days. So it supposed to be finished on 05 July. While I was waiting at the panel beater for the lift I heard that so many client was calling and complain as their car had not been finished on time. I taught as my car only had minor repairing that they would be able to finish on time. Same day on 24 of July due to my concern that the car maybe would not be finished on time I contacted Discovery and I was assured that would follow up with Hofbro Auto Body and give me feedback – no one phoned me. As I did not get any feedback from panel beater and discovery on 4-July (7 working days passed) I contacted Hofbro and I was told that they were busy and workshop manager would phone me. Contacted Discovery spoke with employee Bianca and I was told the same that they were busy and they would let me know later when the car would be finish. As Hofbro’s manager did not phone me I called again and I was told that my car would only be finished early next week. I went to the panel beater and I found that they have just started to work on my car. Car was there for 7 days (working) and nothing special were done. I COULD NOT BELIEVE THAT FOR 7 WORKING DAYS, only minor work was done. Apparently I was told that the light was order (that lights supposed to be there on the day when I brought my car to be fix) but they got wrong delivery – some nonsense excuse. And they only receive the right light after one week on Tuesday 31. Please show me the proof that when the first delivery of light were received as wrong and new one as right part!!! I signed document that they would inform regarding to the status of repairing my car. So if it is true that they received the wrong part they could phone me to take my car until they receive the right part. So car was there for whole week and I could drive it and not waste money for rental car (authorized by discovery) and additional daily insurance for rental car. I am surprised that discovery do not do follow up and check the status of the client’s car and waste their money. Even they have employee at the Hofbor site, who can check daily status of repairing and send feed back to the discovery. Afterwards I phoned discovery (4 of July at the afternoon) to report above issue and I was told that they would check with their employee at the site and give me a feed beak on Thursday – however the same disappointed story even I have not received any call from discovery on Thursday the 5 of July – when is actually due day for my car to be completed.