Hathway — Refund of deposit amount not initiated

I have cancelled my connection a month ago and have the hathway executive has collected my modem and i was told that the refund will come to my account. Its been over a month now and i haven't received the amount back. I have raised complaints but no response. When i tried reaching the toll free no. they hung up on me as soon as i spoke about my refund. Its disappointing that this kind of service exists in hathway. Untill i dint get the connection or renew my pack they would call me a million times a day just to follow up things and now no response from hathway.