Hathway — Tele Callers

I tried to contact Hathway to enquire if their service is available in my area but it seems that it's not available. It's been 6-7 months and people from Hathway are continuously calling me and irritating even though their service is not available at our area. I have told many times to remove my number and it's not happening. It would be great if they could provide a way for the user to remove their personal data from their database