MTN Complaint

On 13th February 2020, I took my contract phone to MTN, Cape Road, Newton Park, Port Elizabeth. The reason for returning my contract phone is because it just went blank. I don't know what happened to the phone. They took the phone and advised me that they will send it to their technicians to fix it. They told me they will call me when my phone is ready for collection. Then in March lockdown started. I could only go in May to enquire. I went in May and they said they are still waiting for the phone. I then went again in June and they told me the same story that they haven't received the phone from the technicians. I then went every month from then to enquire what is the hold up, but they couldn't give me the answer. In October I sent an email to MTN complaints department, they gave me a reference number and requested me to call them when I am at MTN which I did. The person I spoke to at MTN complaints then asked me to give the phone to the consultant at the shop which I did. Up until now they are still telling me the same old story which is now tiring. Please assist.