WORST service from MTN

I received THE WORST service from MTN, if you can even call it "service". I app**** for an upgrade online on 26 Nov with the promise that my phone would arrive at my house within 10 days and the delivery company should contact me soon. After a few days, when I haven't heard from the delivery company, I phoned them to find out that they don't have a package for me. I phoned MTN, going back and forth between different call center numbers given to me by every "service champion" I speak to. Nobody seems to be able to help me. On Wednesday 9 Dec, 3 days ago, I was put through to retentions where finally, a lady named Kamo helped me. Apparently, the person who verified my order never put it through to the next step, which is delivery. I asked her if they could please drop the order so that I can rather upgrade in-store. She assured me that the order would be dropped by this weekend. I went to the store today, Saturday, just to find out that the order wasn't dropped. The lady behind the counter couldn't do anything to help, I had to phone MTN Online AGAIN, just to find out that they're closed. And here I am, my upgrade in limbo, and I don't know what to do because no one can or will help me. Utterly useless service.