Very disappointed

Vodacom has failed me in a very big way. I had a contract upgrade and the sales person said the deal will still work on my number as the previous one but now I have been cut off the network, I cannot make or receive calls anymore and when I tried to cancel this contract I've been told that it can be resolved at the end of September. the bad thing is that this number is my personal phone number that is connected to everything that is linked to me. The only thing that I need is for my number to be able to make calls and cancel the contract that they made a mess up on.