Pathetic Wifi Network

I am absolutely frustrated with the wifi service we've been receiving from Telkom for the past month. We've had the home wifi deal for over 1 ½ years withoutany issues, connecting TV's and numerous cellphone devices to it. Weve got a Telkom tower near our house, so connection was great! As of recent, our connection keeps cutting off everyday throughout the day. We cannot even watch a video without losing connection. We've had a technician come through and tell us that there's nothing wrong with our line. How can we pay for a service which we aren't even able to properly use??? I'm absolutely sick of phoning your Call Centre to report this issue to no avail. I need someone to sort this out or alternatively please force cancel my contract because I refuse to go on with this.