No coverage but must still pay

I lived in a house and had Telkom Wifi with a rooter. Before moving house, I went to Telkom and they looked on the computer and confirmed that I do have coverage at the new house.<br> After moving in - it never worked. It took Telkom 2 months to send out someone to install a dish.<br> Still no wifi working - no coverage.<br> I went in and cancelled the service.<br> I had to sign a form for that and now like after another 2 months they gave me over for not paying. This atter I cancelled and how come - when something is not working still ahve to continue to pay for it?