MTN: Horrible Customer experience

My experience with MTN has been horrible, especially with their HVRC Repair centre. I sent in my phone for a warranty replacement on the 28 November 2018 and was given a 2 week timeline. The MTN shop did not submit proof of purchase even after I asked them if it is required or not, now the HVRC Repairs is telling me that I have to wait for 21 days on top of the 2 weeks to get a new phone even though the mistake was on MTN's side. To top it all there is an Agent by the name of Nomonde at the HVRC CCC who always hang up the phone immediately after answering then there is Prescilla who is rude and keeps blaming the MTN shop for making a mistake and saying that the mistake is affecting me as a customer. Why do customers have to suffer for a mistake that was made by a company that doesn't to accept responsibility and keep putting blame on their own.

MTN’s internal blame really look bad and pathetic for them, and as I customer of more than 8 years with MTN I am really frustrated and annoyed by the service I received from MTN.