Above and Beyond Poor Service

I contacted MTN's customer service centre on the 2nd of October, 2015, and spoke to Noksa - Ref no ***, regarding cancelling my internet contract. She confirmed that my contract was cancelled with immediate effect and that the sim card will be deactivated in a couple of days to follow. She also explained that another debit order will go off in November, 2015, because I had to give 30-day notice, which I accepted. The sim card was deactivated on the 5th of October, 2015, and there has been no data usage on the sim card since the 5th of October, 2015. I cancelled the contract because I am living in the United Kingdom at the moment. I sent emails to [Email Removed] regarding my query on the 27th and 29th of December, 2015, the 9th and 12th of January and the 9th of February, 2016 and received a responses from Retentions asking security questions and only confirming that the contract has not been cancelled. Debit orders are still going off my bank account.