Expected to pay fro ADSL that was never installed

In October 2014 I app**** for ADSL line with Telkom, I already had a telephone line from them. The ADSL line was 'installed' on the 27th November 2014. When I used the phone I realised the phone number was different, I then called Telkom and a technician was sent to investigate because according to their records both lines were installed. The technician checked the line and he informed me there was only one line installed, he then converted the line from ADSL to telephone line. The phone number issue was sorted but there was no ADSL. The technician said he will report the matter to Telkom so that they can send a technician to come and install the ADSL line. I kept calling Telkom to notify them and every time a technician would come and tell me the same story as the previous one, but they never installed the ADSL line. I have been paying since November 2014 till September 2015 for ADSL that was never installed and when I request a refund they refuse. In September I called to terminate the contract, I was given ref number 3655-45 and told that it shows that there was no ADSL on the in property. In October Telkom debited R870 for terminating the contract. I NEED TELKOM TO REFUND ME!!!