ZERO Customer Service (Shop No G57 - Galleria )

My Mom ( age 67 ) had a MTN contract with Autopage. Autopage closed down and MTN is taking over the contract directly. During this time, My mom's Samsung phone gave problems. (screen is blank) She took it to the MTN shop in Galleria so they can repair it, this was about 2 weeks ago, they requested a proof of purchase, my mom misplaced it so they told her unfortunately they could not help her without the invoice. A week later I phoned them and gave them the serial number of the phone so it can be traced to a legal MTN contract. This was about a week back. They keep on telling me they are waiting for call centre or repair centre to confirm the phone's identity. I have spoken to Tammy, Jerry and "Shumain" . Shumain in our last conversation **** to me about the whereabouts of the manager ( Jerry ) He said he was not in the shop but I heard him speaking to Jerry in the back ground while I was on the phone with him. They had no respect for my mom that is why I intervened but with no success. If I with some luck get them to answer their phone *** they will only tell me they are still waiting for feedback from the "repair centre" My mom is an old lady and she is without a phone at the moment, as you know these days one can not be without one. All 3 of them had no willingness in assisting with this request. My mom might cancel her contract and move to another service provider with better staff assisting her. I honestly hope these 3 persons will put more effort in resolving this issue before this have to happen.