Harassed

After waiting months for my line to be installed and after having many issues with the line and receiving poor service at best, i cancelled the line and upgraded to a fibre service. I was then and ONLY then informed that I had to give 3 months notice and they continued to send bills for 3 months. Since I was never made aware of this fact at any point I refused to pay. They then handed this over to debt collectors who continue to harass me for an amount that I refuse to pay. I demand that this action be stopped and the debt erased since i was never made aware of this clause at any point and so refuse to be liable.