Impossible to cancel a new contract, everyone at MTN gives different advice. Order#***6

I app**** for a new, sim only contract. The online process was easy and quick. I waited very long for the sim delivery (but that is the courier company, not MTN). I was called twice and told which documents to have ready. I took delivery of the sim and followed the website information to port my number. No joy. I called customer services daily - Thursday - "no, you must have entered the code wrong". I resent it. Friday - "Try again, it should work". Saturday - "oops, no one is working to help with that today, go in to the shop". Monday - called customer services- "What am I talking about, this number is for prepaid, not contract?" So I went into the store - "Oops, you can't port once your sim has been activated (at delivery). You will have to cancel the contract. But we cannot help you with that, you have to phone". So I called, again. First wait - 10 minutes, explained my story, got hung up on. Second call, waited 14 minutes, got hung up on. My plan was to cancel the contract then reapply so that I can port my number, now I think I'll avoid them like the plague.