Poor Service Delivery and *********

I took my car for repairs almost two months ago. I explained to them that I was a sales man and I was dismissed from work due to the fact that I signed that I have a car and I will be using it for work related purposes . I spoke to Sonja who is reporting to Suzan Du preez she came up with an idea of loan vehicle and her manager Suzan declined that. My car went for a 1st service thereafter the reverse gear did not function anymore . Then I took it back to hyundai they explained that it was involved in an accident that I understand of which they should have picked up on the 1st service. Ever since I took my car for repairs they haven't communicated with me as to how far they are with my car . The have been been telling me that they waiting for a part from Korea they said they will get it on the 11th March 2015 the was no update on weather they did or not. I was the one who asked but no respond. I just want my car back before business closed on 13 March 2015 cos I know I send only that problem of a gear reverse to them anything that will occur I'll sue them . Failing to do that I'll have to take it up with them