Den — not able to see hd channels

Address:

Thane, Maharashtra, 421203

Hi,

I was taken new connection before 3 months back of DEN HD set top box, but after 3 months HD channels are not able to see.
When I contact to cable operator he directly said you have to paid additional money now for HD channels.
This is rediculas because when new connection established cable operator said you will see all HD channels in monthly installments and not able to paid any extra amount for HD channels.
Kindly help me in this issue because it's unnecessary issue I am suffering after paying monthly installments also...