Makro Online order :MAK***, no refund since July 2024 to date.

I ordered an airfryer in July 2024, online at Makro, received it but it was used, requested for it to be fetched and for a refund, they fetched the airfryer within 2 days, but I never received my money back. Called several times was told the refund failed as they did not have my banking details, I then sent the banking details but still no refund, called again and again was told the money was deposited on the 8th of September it should reflect by the 14th, the 14th came still no refund, called again was told it will reflect on the 2nd of October, still nothing, called again and again even requested to speak to the agent's manager was told the manager is too busy she won't talk to me. Called their head office spoke to a guy in their finance department, asked him for proof of payment and I haven't received it, was told I will be emailed and called back with feedback, to date 15 October I haven't received any feedback or the call nor my money back. Please assist I do not know what to do anymore. Here is my order number MAK***.