Cancellation of Contract

I would just like to cancel my contract with MTN, unfortunately I am not in South Africa, therefore I cannot call the customer care number. Please contact me as I need to cancel the contract as soon as possible. My contract is reaching it's 2 years, so I can cancel it without issues. I have sent a mail to MTN customer care, but I am not expecting a response, so I am going directly to Hellopeter.