Shocking service from MTN

I had trouble with my Huawei phone and went into MTN to report this and see what needed to be done to get the phone fixed. They established that it was a faulty motherboard (after only 11 months) and needed to send this in for repair. After three weeks with no update on the status of my phone, I visited the store again and was told that the phone was still with the courier! They then only enquired where the phone was and figured out that is was still with the repair centre, after promising to get back to me. After numerous visits to the store, I have yet to receive a call from them with feedback. Last week on my umpteenth visit to the store, I was eventually told that the phone is irreparable (2 months later) and I will received a refurbished replacement only once they have one available. No indication of when I can expect this phone and no offer to keep me updated on the stock availability. My contract has still carried on every single month and I seem to be paying an instalment for a phone that does not exist. Seems that no one at MTN cares about customer service.