Telkom can not cansel an account

Good day. <br> We were called by Telkom to sell us a Fiber line. They said that we can get a 10meg 50 gig soft capped line. When asking about the soft cap we were told that once we reach our 50gigs they throttle us to 4megs for the rest of the month. This sounded good and we app****. installation was to happen in 22hour. it took them 2mths to install. 1 hour after we were up and running our line speed dropped from 10megs to 175kbit. On enquiring this Telkom told us we reached our limit and they throttled us not to 4megs as we were told. Upon hearing this I said we want to cancel this service as this is not what we were told. Forms were mailed to us and we were told to complete them and take the devices to our nearest Telkom store which we did. This all happened on the 26th of January 2016. We have been struggling to cancel this line ever since and no one comes back to you. After many mails and phone calls I was given an email address of a Ashley who is supposedly the cancelations manager. We received a sms from him stating that the fiber line has been canceled and all costs have been reversed. Even this was a lie. Even though we no longer live at the same house we are still billed .