Paid for a service to be told no service was done

We took our car in for a service on 26 October 2021. Was told late morning that the service was completed and the break pads needed to be replaced at a cost of R5000. When I arrived to collect the car i was told it was not ready. and they had not washed it yet. I had to wait for 1 hour for this to be done. After settling the service bill, I was then informed they made a mistake and had not serviced the car at all. My car had been mixed up with another car. Due to other commitments for the day i had to leave asap and only managed to phone the manager later that day to complain. He explained the 'mistake' on their side and gave a very mediocre apology. He then asked what compensation would i like, but was too flabbergasted to respond. I have been using this dealership for a few years, but this last experience left a very bad taste in my mouth. I would not recommend using this dealership to anyone.