MTN UPGRADE - DEVICE FAULTY - WORST CUSTOMER SERVICE

I am disappointed with MTN. I have to warn MTN customers. I did an upgrade at Canal Walk MTN (while on holiday in Cape Town - details which I informed with the salesperson) on Saturday. On Monday I reported that my device (Huawei Nova 9) is faulty at my nearest MTN store in George. Now MTN wants me to drive 500km to Canal Walk to hand in my faulty device for a new phone. I was promised that if my device gave any problems within 7 days, they will immediately give me a new phone. The salesperson never disclosed that I needed to hand in the device at the same store - which would have made me reconsider rather doing the upgrade in my hometown. I phoned (MTN Canal Walk, MTN Customer Services), emailed (MTN Customers Services and MTN Customer Complaints and the "ombudsman"), reported (MTN Customer Services, Garden Route MTN and Canal Walk MTN) and and complained - MTN ignored ALL my requests (Canal Walk MTN just threw their hands up in the air and said I must drive 500km). Please avoid device upgrades with MTN!!! I did not even get the 20gigs once off data that they promised and advertised. No good on their promises! Best of all - the problem with my device is that it does not want to call 135 - MTN Customer Services! I had to use my husband's device to dial! All they accomplished is that I never want a Huawei phone and my contract will be cancelled as soon as possible.