Siti Cable — refund

Address:

C- 37 Rajpur Khurd Colony, New Delhi, Delhi, 110068

Siti cable provider is refusing to refund the amount of set top box that i want to return it back. We always used to pay before month but they cut the cable before 5-7 days before completing the month. It is done by them many times in between last 6 months, that's why we want to close our account from your cable. Please do inform to me that how do we get the refund.
Thanks
Name pawan
Email [protected]@gmail.com