Hathway — hathway wifi connection _ disconnect

I have asked the hathway to disconnect the wifi connection thrice. But i still get monthly bills for it. I have not been used wifi connection since mid march and i am not going to pay the bills here after even though it is generated. The customer support is very poor. They just keep calling to pay the bills. When i got a call, i told them to disconnect the connection but they did not do it and instead kept sending bills for the same. I have raised a incident request as well, got a response with ticket no. 147386 but i do not see any kind of progress and even today i got a reminder to pay the bill.
I would like to have a refund of the past 4 months and wifi disconnection immediately.