Tempest non refund an entire month after car hire.

Booking number TORTA ***RS5. I hired a car 8 November 2019 and returned it 11th. I called to enquire about my refund about 5 days after dropping off. The lady then gave me another invoive number TORTA ***RS5. After calling several times I was told they were migrating to a new system hence the delays in refunds. I was only invoiced on 19 Nov. The initial deposit deducted was R4384.63. On 20th another amount of R793 was deducted as per invoice. To date there has been several calls and emails with Nannette Hatting from customer services. Always postponement and no clear timelines. This was must 1st time using tempest and never again. I was unhappy with Europcar with small things really but always get my refund within 4 days. I have since hired 2 cars since at Europcar and got both refunds. Tempest is not the 1st corporate to migrate systems and it does not affect customers this much. This is very inconsiderate because if tables were turned and it was us owing there would be no tolerance.