Terrible service

My car was towed into BMW West Rand on the 15th of July 2024 to receive repairs pertaining to a coolant leak. I was promptly issued with an invoice following inspections and was asked to pay a deposit of R11,000 for repairs on my car to be commenced - a request I understand now to be irregular as other branches I reached out to confirmed that I am only liable to pay for repairs once they have been completed and my car is ready for collection. I nevertheless paid this amount on 25 July 2024 and was told that I would be updated on the progress made.

I followed up on the next day and was made aware that one of the parts required, namely the coolant pump was out of stock nationwide and that the same part was ordered from BMW in Germany and was set to arrive within 10 Business Days therefrom - I can confirm that over 15 Business Days have since passed and to this day the only feedback I have received (which feedback I only get through following up) is that the part is question has still not been received and that no one knows when my car will be ready for collection.

I wish to emphasise that I am incurring substantial financial loss and damages as I am forced to rent a car every day that mine is away, as well as continue to service the debt I incurred to pay for the above mentioned deposit and monthly instalments on my car.