Unhappy customer

I bought a Midea microwave 30l on 22 March 2025 and we were not happy with the microwave because button 7-9 did not work. We returned the midea microwave to House and Home Kolonade montana on 29 March 2025 (within 7 days) requesting for a full refund and they refused to give us a refund and told us that the microwave will be booked for repairs and taken to Midea warehouse to be inspected. We insisted on the refund because we are not happy with the microwave but still the manager refused and told us they will call us when the microwave is back from Midea warehouse. A few weeks later we received a call from House and Home Kolonade montana informing us that the microwave is back and that those buttons 7-9 we designed that way, not to work when you press them. We still requested the refund because the midea microwave is complicated for us and we are not happy about the microwave, still the manager refused and said that he will not refund us we must collect the microwave from their shop. Till to date we have not received our refund, House and home Kolonade montana is holding our money plus the microwave in their shop. When we contact them immediately they hear is us calling they hang up on us. We are very trusted with thud shop and the management, we are unfairly treated by management and our consumer rights are being abused. We want our refund and nothing else!