1.5 years of dissapointment in Audi SA Fourways

Bought my Audi A3 cab almost 2 years ago- and spent over a year in and out of the service department trying to fix a oil light that keeps coming on - Audi Fourways has given me the incorrect information which has literally forced me to go in on a monthly basis for over 14 months - giving me the run around back and forth!! Finally a few months ago I thought I may have had some luck after speaking to the service manager who assured me he would get the problem solved - since then I have been back 3 times! I then went directly to the dealer principal (Fourways) - who again promised he would see this to the end and ensure that my vehicle would be fixed - after keeping the car for over a week I got it back and on the very same day the vehicle started jerking on the road with my 7 year old daughter - we had to pull over as the car lost power. Technician came out and said the car was fine... needless to say the jerking persisted and 3 days later my garage floor was covered in OIL!! A completely new problem! Audi Fourways will this ever get fixed? I am beyond frustrated - I have lost all confidence in Audi and your ability to help me!