hathway boardband - Harassment due to marketing call

I have had Hathway internet connection for over * months and moved to another broadband service as I received better benefits for a reasonable price. I have followed all procedure for exiting from Hathway and returning their router with the wire and all that and then begins the nightmare! The marketing calls forcing me to join Hathway again. Even after denying so many times I am still receiving minimum ** calls from hathyway everyday morning to the evening for the past * months. This is harassment over phone rights. You cannot do this to anyone. Who has give you permission to call my number so many times a day to market your product? I work in a night and I get to sleep only in the morning to afternoon and my phone cannot be on silent for what so ever reason but Hathway has been contacting me not letting me sleep for the past * months and forcing me to accept their services! I don’t need it I don’t need anymore calls from Hathway. I have spoke to hundreds of specialists/supervisors from Hathway requesting not to call me anymore and take number off and even after so many promises they still call me every day and ruin the peace out of my life. This company has to be punished for disrupting and invading my day to day chores. I have blocked multiple numbers from Hathway but still these people call me everyday. If this persists I am going to file a lawsuit against Hathway and I’ll go down the road to any extend to destroy your company. Morons