incorrect billing.

In November2014 i was called offered a contract and was told I was gonna pay R59 nothing more nothing less, where I even confirmed to the person calling. Then 2 days later vodacom debited me R388,when went to enquire the told the are 2 sim cards in the box sent one with R350 airtime and the 2nd one for R60. I requested immediate cancellation of both sim cards as I was not give proper information. Which they said they cancelled and will collect their phone. I did follow ups even send an escallation email to vodacom and they rep**** that the contracts will be cancelled and the phone to be collected. 2 month later, the phone still not collected and now vodacom is sending me letters that I am in arrears of numbers that have not been used. And incompetence of their staff and misleading information of the third party involved(afrizon). I want vodacom to clear my name of which its their fault and I have proof of email communications that cancellation was request.