Pathetic Customer Service from MTN Network

Hi

I have attempted to cancel my contract more than 20 times by calling the 135 number as this is the only way to cancel a contract, however the call always cuts out after the security checks and I am never able to complete the call. I have been on a contract for 3 years, and on month to month for over a year, without using the contract as I no longer live in South Africa however they continue to debit the fee monthly from my account. I am currently in South Africa visiting family and need this sorted out as a matter of urgency. Please contact me on +*** or ***. Regards