Incorrect iPhone Repair + Terrible Customer Service

I booked my iPhone 7 in at the MTN office in Clearwater Mall on the 17th of October. During the course of my iPhone 7 being booked in, I paid R220 for the purpose of repairing it - as I was informed at a later stage that my warranty period lapsed. On the 6th of December, I received a phone call from the Clearwater Mall MTN office that my phone has been repaired and is ready for collection. However, upon my arrival, I find out that my iPhone’s battery was replaced, yet on the contract I clearly stated that the issue is with the microphone (since people are unable to hear me when I call them). To no surprise, my phone still had the same issue. After two months of waiting without a phone, my phone is still not repaired. Furthermore, the amount I paid towards the repairing on my phone was for the replacement of the battery (which was never the issue nor was it stated to be the issue).

I have emailed ********** However I have not received a response nor an acknowledgment of receipt (this was a more than 3 days ago).

I have been without a phone for more than 2 months. This is terrible customer service demonstrated by MTN staff.