Dell laptop refund not received

I purchased a Dell laptop from Makro I had it not even a month and it crashed the graffic card was faulted I then was instructed by Makro I would be refunded. I have proof that the refund was logged Makro now after not refunding me have now stated there is nothing wrong with the computer dell intel core i7 13 th generation I’ve and over the screen went off. I called the call center and the call centre at Makro assured me of the refund that would be refunded in full. I have not received the refund it’s been 10 working days I contacted Makro now and they refusing to refund me. Stating that the laptop is at the supplier google dell intel core i7 laptop and it has issues with its graphics card. Makro at no time in the return and days after contacted or updated me on that Makro would not refund me no communication nothing . The call agent Duikero stated they will get back to me but no time frame given so how long will that be? This is not the first time I have had problems with Makro on line purchases I also had a delivery of a gas stove that was in bad condition I returned it to Makro the same day with the delivery driver it took 2 Months to get Makro to get the supplier to produce a new gas stove. This seems to be a problem within Makro and their third party suppliers.