NON DELIVERY OF A PRODUCT, NO RESPONSE TO ANY OF MY COMPLAINS, EXTREMELY RUDE CALL AGENTS AND SALES PEOPLE

I ordered a phone after constant naggings by MTN call agents that I must renew, we agreed that I would get a HUAWEI P9 lite for around R229. WORST MISTAKE!! Its been close to a month now, no phone! I was told by that I was going to receive the phone the Friday of that week, and that Monday would be the latest. I called around Wednesday, and the tone was different, the guy who helped me was extremely rude, he was telling me that MTN has changed their courier company, and it was my responsibility to call and tell them if I had not received the phone, he slammed the phone on my ears. Fast forward to 3 weeks later, I am still sitting without a phone, MTN has sent me a bill, the bill is for over R300. I have called a thousand times, my phone calls are either hung up, or there is a rude person on the other hand giving me another number to call. I have tweeted MTN, no response. I have emailed, no response. I was sent an email that my complain will be looked into in 5 working days, I live to see that day because 5 days has passed. I am extremely frustrated.