Poor service MTN upgarde center!!!!

Highly dispointed with MTN service...upgrade division the upgrade was done on the 02/02/2019 spoke to consultant Cindy reference number : ********** 65 who was very friendly at first when she wanted the sale and also advised me if the device was faulty (Samsung S10 Plus) she would have it replaced within the 7 days period of purchase and also if i was not satifised i would be able to cancel the contract within 20 days. The device was faulty and i was advised to hand it in to the MTN branch at the Glen Shopping Mall. I called Cindy to advice her the device was handed in to MTN at the Glen and if she would kindly get back to me with feed back Cindy did not reply to any any of my calls or messages that i had left for her. A lady by the name of Akashnie assisted me and told me she was waiting for a credit note to refund me. After a few days i had still not receive feed back from any of the consultants I was put through to many departments including a repair centre every consultant i had spoke to gave me a different story i finally asked for a supervisor and left messages but no supervisor had contacted me to give any feed back on this matter 21 days has passed and still no feed back. I called again and spoken to a Sandile who promised to get back to me unfortunately still no feed back. I would not recommend my friends family or colleagues to upgrades with MTN consultants at the upgrade centers as they service is poor and pathetic. Im highly disappointed and i have finally canceled this upgrade. As i write this complaint i still have no feed back from any of these consultants. As far as im concerned mtn consultants dont care and have no customer service.