vodacom is ****

I took out a contract with Vodacom online on the 29th July. I got the phone on the 31st. I called back to say I want to use my old number that I had with Vodacom so they must transfer the contract to that number. In August they debited and a few days later they tried to debit again but there was no money on my account. When I called I was told I had 2 numbers under my name but few days later I got an sms to say I was owing and another saying they did a credit note. Now Month end of August they were supposed to debit 208 but debited a R100 more and when I called they told me it is because of that debit order that bounced back. But whose fault is it that they did not do their jobs correctly because I cancelled that number the same day I received the phone. I called again after it was debited and a lady from accounts told me that they will send me back that amount of R100. Now I just called again and I'm being transferred to different departments and no one is helping me. My no is ***. I have never used the other number that was sent to me with the phone. I want my money on my account.