Subscription Not Cancelled after 3 months

I opened 2 accounts with Telkom in November 2015 (purchased phone and line; 1 for me and 1 for my wife). I have been using the lines and usually do not default on my payment. I left the country after about 14 months of usage but still continue to pay my bills(phone and line). My wife also left about 4 months later but I still continued to pay both bills. When it was about 1 month to the end of the contract, I put in a request for cancellation as advised by the customer care agent that I contacted. One of my lines was cancelled but the other was not. I have sent about 4 emails to Telkom Cancellation unit and till now it has not been cancelled. They have been charging me since then and I found it difficult to have an audience with anyone that could assist especially since I'm no longer living in the country. This is such a bad customer service and they are unnecessarily swindling me. They will soon exhaust the little money left in my bank account and I'm currently not able to close the account because of this monthly bill. I do not want to incur unnecessary charges that might haunt me in the future, hence I'm reporting this bad treatment in this forum.