Useless Telkom

I live in an area where we struggle with poor signal. I went to Telkom to get an internet option. It did not work. Within 10 days of getting it I took it back as it could jot puck up a signal. I cancelled the contract. I received bills for three months. I went in twice again to make sure it was cancelled. At Zambezi branch they told me it was logged but still waiting for it to be cancelled I must not worry. This was some time in Feb. They now called me demanding money and said I was liable to pay it. You are the most useless company in our country. YOU are everything that is wrong with this country! Get this sorted out NOW!