Bad service

About 6 weeks ago my Tata Indica would not start. I had the vehicle towed to Tata in Ysterplaat/Milnerton. During the last six weeks that the vehicle has been with them, they have not phoned me once with a progress report. It took them nearly three weeks to find out why the car would not start and till date I have no idea when the car will be fixed. I have been told that the vehicle has been moved to an auto electrician, to investigate the problem. They also mentioned that they think they now know what is wrong (something about the fuse box that blew), but they still did not know what caused the problem. I have owned a Honda, Hyundai Getz and other vehicles, but never in my life have I ever received such bad service.<br> I have also on numerous occasions asked whether they could assist by giving me a courtesy vehicle, but they just say they do not have a courtesy vehicle available.<br> Please advise what steps I can take in this regards.