Very disappointing service!

I'm sitting in a hot car, with my dogs, meant to be on our way home, 1200kms away before the lockdown, waiting for my husband, who has to take the vehicle we bought from this business, to American SUV in Centurion. The engine light came on during the first trip after collecting the car, we were told the vehicle had to have a service to qualify for the warrenty we purchased, yet American SUV says they only did an oil change, and did not service the car. The dealership is not interested in this, or any of our other issues. It took them more than a week (after a reminder), to pay us the balance of our trade in. We are thinking of returning the vehicle, and buying one through another dealership, very disappointed at the moment!