Account upgraded/migrated without my permission

<br> I had a data contract that expired September 2014. In December I was in SA and the before day I flew back to the US i tried canceling the contract. I called the retentions department and I was advised that the contract was either upgraded or migrated I had no knowledge of this. I did not receive a handset or sign any documents for this. I spoke to a team leader and asked her to investigate it for me. I asked to be contacted via mail knowing that this was the best way to contact and I was told that this was not possible. I did receive a call the next day but was unable to take the call at the time. I have noticed that my account is now being deducted with almost R1000 for something I don't know about. There was no real attempt to resolve this by the team leader to ensure that this was not ***** on my account. i an really disappointed by this customer experience and need this to be resolved a.s.a.p. please note I'm am staying in the US and can only be contacted via mail.<br> <br>