Telkom doesn't care about customers

Hi, my cancellation enquiry number is ***6. I have a Home Office LTE contract. It was great until I moved premises in February, 2015. Now at my new premises there is no signal. I reported the matter to Telkom Mobile in March 2015. Two Telkom technicians have visited and both agreed that this is true and nothing can be done. Lucien from Telkom Mobile cancellations contacted me by phone in July to agree that Telkom Mobile were going to proceed to cancel the contract. This is the last time I was communicated with. It is now September and I am being billed for services not received since February! I have tried to email the cancellations deparment many times with no avail. What kind of company acts this way, especially when I have already taken out another Telkom contract for ADSL so that I can get internet at home. Effectively paying twice! Its not like I am leaving Telkom for another supplier. It seems Telkom are just happy to collect money and not bother about the customer!!!