Hathway — Threatening calls and mental stress

Address:

Hyderabad

I used the Hathway broadband [prepaid] Account.no- [protected] in the year of 2014-15 in hyderabad then I shifted to my home town but they are calling and blackmailing me for not returning the modem and router as I was not informed to return the item to them though I paid around Rs 2825/- for not returning and they told everything is sorted out ur account is closed do not worry about it but they are still calling and saying that we are calling from Mumbai will take legal action if you didn't pay the amount. I was mentally disturbed for those call not able to sleep properly. Please help me out with the problem.