Bad and Poor service to customers

My experience with Vodacom has been horrible, I've had a contract with 4 numbers with Vodacom for years, I've always upgraded my phones at the end of each contract, now i asked for 1 number to be cancelled as the contract had ended and i wasn't using the number anymore however this has been a nightmare...over 6 months trying to cancel 1 number then the agent goes and upgrade the number instead of cancelling, now I've been bind to pay for 24months for something i never asked for, of course I've raised this with Vodacom and requested for a cancellation since November, 3 months now and it is still not resolved, its a nightmare dealing with vodacom, if it wasnt for my parents that ive put on this contract i would have just cancelled everything with vodacom and stop paying, every month they are deducting, i never give them any hustle but i must takes months and call them each time just for my query to be resolved, every time i call i get told about escalation but no good results....Im so fed-up, so much for being a loyal customer and this is the service we get