Return and refund

I bought a microwave on the 20th of Feb, Makro promised to deliver on the 27th and it never happened until I decided to cancel the order on the 8th of Mar. After cancelling the order with a contact centre consultant on the 8th and confirming it with Otsiele from complaints on the 15th, Makro delivered the goods on the same day(15 Mar) and forced my niece to sign. I logged a return online and received confirmation, I even called the contact centre to confirm if the return was logged. Nothing happened till today. I've been calling the contact centre and all I'm told is that the matter is being escalated. I want them to fetch their microwave and refund me.