Consistently poor service from Eastview BMW

We received consistently poor customer service from Eastview BMW in Nelspruit during the recent service and repairs to our vehicle. <br> <br> The vehicle was on their premises for three weeks, during which time it was damaged in an accident. During this period, we received very poor feedback on the status of our vehicle. Since we collected the vehicle, the car alarm keeps going off. Eastview BMW insist that this is unrelated to the incident or the repairs carried out by them and we now have to pay for a new part for the alarm. We have complained to the branch and to BMW South Africa regarding the poor service and their response is that there is nothing they can do.