No service when canceling a contract

I've decided to get a cell phone contract from Vodacom and go one I told the guy I want to keep my existing number and they decided to give me a new number and they also activated the new number for me. So after about 5 calls to Vodacom they changed it to my old number. And then they deduct money from my bank account for 2 contract the one for the simcard they gave me and my simcard. Decides to cancel the contract phone was collected and after 3 calls to Vodacom contract isn't cancel yet. The last time I phone the representative from cancellations said to phone back in 30 min so I did and they where closed for business. And still no one to help and just cancel the contract. Every time I phone they give me another reference number. And that is after all of the people tell you that I'm speaking to the wrong department and then they give me a other number to phone and that is still going on. I'm keep on getting send from the one person to the other. And when I speak with cancellations they say I must hold on for someone that can help me and no one wants to help me. They are very fast to give you a contract but if they messed up they don't want to fix the problem. I just need it cance