Vodacom messed up my Cancellation

My number has been suspended last week after I got a SMS stating that my account is in arrears. I've been paying my vodacom bills without fail for over 13 years. Phoned them this morning and they claim that another contract on a different number, which I cancelled September last year, was actually not cancelled. When I did the cancellation, the rep on phone confirmed that it was indeed cancelled. I even stopped getting invoice for this contract and the number was removed from the Vodacom Portal on their website. Now they claim it was never cancelled and its going to take them a full 2 weeks to actually listen to the recordings. In the meantime I can't use my phone and might even get a black mark against my name because of Vodacom's mess up. If you reading this, rep from Vodacom, get this sorted ASAP before I get *****ed over because of your mistakes!