Contract cancellation unsuccessful

I have tried unsuccessfully to cancel my contract and stop paying for a service that I can no longer utilize for the past few months. Yet its been almost 4 months and I am still paying for a service that I cannot use and cancelling the contract seems practically impossible.

I was told to call +2783 1 808 and speak to the cancellation department in order to cancel my contract, however I have to to get through to anyone that can assist me. I am not in South Africa and phoning the aforementioned number costs me a significant amount, only to have the call dropped on 20 minutes every time.

I need to have this contract cancelled as I am in the process of closing my bank account to which this contract's debit order is linked. My bank account is set to be closed at the end of November 2017.

I spoke to someone in the call center on Sunday and he promised that the contract cancellation department will give me a call on Monday - I am still waiting for the call...

Things I have tried thus far (unsuccessfully): - I went to an MTN store before leaving the country to find out what I need to do once the contract expires, they told me I could simply email ********** and request a cancellation. - Upon emailing ********** I was informed that I need to go into a store to be physically present to cancel the contract, so I had a power of attorney drawn up and asked a relative to go into a store and cancel the contract. - The store told my relative that the only way to cancel my contract was to call the call center and run through the process. -And here I am after multiple unsuccessful attempts of calling just to cancel a contract and MTN is still taking money from my bank account every month.

I want to have my South African bank account closed, but this debit order is still linked to the account, and I would like to avoid being black listed because the debit order will no longer be able to go through.

Could someone please contact me with an efficient way to cancel my contract and that actually works and does not keep my on hold for 20 min and drops the call.