MAkro - Returned microwave.

I bought a Bennet Read microwave at end of August from Makro online, in September the microwave made a strange noise and stopped working. I returned it to Makro Cape Gate on 21 Sept, requesting a refund which they refused, afterwards I went online and on the App, I was allowed to request and approve a refund to be paid by 6 October. Today I got a call from Makro Ottery wanting to collect the microwave. I told Tracy that I already returned it to Cape gate, her reaction was then I must sort it out with Cape gate. Surely if an item is purchased online "Makro" must resolved the problem and refund. It is not for me to follow-up and chase Makro to refund. My understanding of the consumer Act is that any item can be returned within 6 months of purchase and refunded.