GOT BILLED FOR AN FRADULENT UPGRADE

For the second time in a row I got billed R1300 for an Huawei P7 which I took on contract over a year ago, I submitted documents , including an affidavit stating that I never took out an upgrade after the P7 last year and I was promised that the upgrade will be cancelled. And this morning the harsh reality of how futile is MTN when it comes to protecting their customers once again re-surfaced. Why would I take out two upgrades in a space on 6 months on a number that I dont use. I have only one number with MTN, which is *** ONLY!!! I swear under oath I have considered legal action against whomsoever is involved in these repetitive unauthorised upgrades on my accounts. Cancel the other number in my name please. ONLY USE ***