Hathway — Account- [protected]: Harassment by customer care

Since last March i am not recharged for my Hathaway broadband connection since it provides terrible speed. It's a prepaid connection and i am willing to close it which i have communicated multiple times. In spite of that Hathaway has been calling me every day asking to recharge my account.
It's torture!!!
Please stop calling me. I am not interested to use Hathaway because of the terrible connection it provides.