Avis will not release my refundable deposit of R1500.00

Received a hired car from Avis to be collected at Avis Mondeor through my insurance. The insurance claim number was *** and Avis rental agreement number was ***6ZA4. A compulsory cash deposit refund of R1 500.00 was processed through my cheque card on the 14th of September 2022 and the car was subsequently returned to Avis Mondeor with no issues and problems on 28th of September 2022 after numerous SMS reminders and threats long before the car was even due to be returned. Now today 11 October 2022, my refund for the deposit is still not released and I was told yesterday by a call centre agent that because I used a cheque card, this refund may take up to 30 days to be released. what utter bull dust and *******, I demand that this refund be released to me immediately otherwise I swear that I will do a one man protest at Avis Mondeor with a huge placard reading AVIS ARE ******, and believe me I will, I have done it before and it worked in my favour.