paying for services that never worked

I signed an internet contract in March 2014, however was unable to access the internet. I have been to the where a sim swap was done but was still unable to use the services. Since April 2014 I've been to the store in Chatsworth 3 times to cancel the services. they had logged a call. I continued receiving statements, my bank account being debited monthly. In May 2014, I signed up for a Telkom ADSL line as I desperately need internet services. I am currently being billed by both Telkom Mobile and Telkom ADSL. I have called the call center on numerous occasions, but received no help. In August 2014 2 females from the technical section called me ad confirmed that the contract will be cancelled. I was advised to cancel the debit order. to date nothing has been done to assist me. I have called and spoken to \team leaders"";nor are they willing to provide me with a managers name or a contact number of someone who can assist me. I am still being charger monthly for a service I do not used and has never worked """