Hyundai Roodepoort

My car has been with Hyundai Roodepoort for over 30 days, no communication. Everytime I call they keep changing the ETA of the part to be delivered, service advisor appointed to help me has not communicated anything to me except for the first day of the quote to tell me how much their service will cost. I don't have an alternative car given, the manager has not responded to my call back request even worse the head office complaints line rings unanswered and when you get thru to customer service they tell you they can't transfer call. I honestly just need my car back no need for this unhealthy service delivery. So can someone call me and tell me when I should collect my car or get me an alternative one