Worst online purchase experience of my life

I'm writing this review because I'm out of options and I don't know who to turn to for help. I placed an order of a microwave and a powerbank at Makro Online on the 20 February 2023. On the 21st I called to cancel the powerbank as I found the old one I thought I've lost. They did not cancel it and forced to deliver it, I returned it with the courier company (courier guy to be specific). They delivered the microwave on 23 February 2023. After the delivery I realized that the numbers and defrost buttons are not working and I called them on the 3 March 2023 to report the matter and ask about my refund of the powerbank. They gave me reference numbers but nothing has happened ever since. What makes me so frustrated and disappointed with their service is the fact that I did the purchase online thinking it's fast and convenient for customers like us who doesn't have time to go to the stores, only to find that it's the worst experience any customer could experience. I regret doing this purchase and I would like to find out if I am ever going to receive any assistance and refund from Makro?