No feedback as promised

The rented car was dropped off at the panel beaters by my son to be collected by Tempest on 18 February. After not receiving my refund deposit, I phoned Tempest and spoke them and I was advised that the car had a flat tyre when it was collected I was told a supervisor would phone me back. This did not happen. I phoned again and spoke to Precious she promised to speak to the person who collected the car and would phone me back just now, after half an hour I had to phone her again, this time she confirmed that the car had a flat tyre and the matter is with their claims deparen't. Up to this moment I had no response from anyone at Tempest. POOR SERVICE