Vodacom tricket me into another contract!!!

I got a call to say that now that Data is made cheaper, vodacom wants to amend my contract to a better data package. This would not change my number or influence anything other than bring the R250 down to R199 for double the data. I would receive a new sim card with the same number.

I did get the sim card. I put it in and followed the prompts. Since this I could not make any calls or receive any calls. I phoned vodacom 082 135 and told the guy my story. He then said he sees its an open line.he would reset my sim. I should switch off for 10 min. Then it should be fine. It was not.I phoned again where a lady helped me. She informed me that they created another contract with another number for me on my profile. This was NOT what I signed up for. Now I have to sort this out and get it cancelled. The could not manage to even update my surname for over 10 years, how long will it take to cancel a mistake they made or rather bluntly **********ly created a new contract that they can also make money off. I would rather just close my accounts and move to another company.