D2H removed channels without consent and not reducing rate either

I have a D2H connection recharged for 6 months. All of a sudden d2h provider removed few channels and when asked told me that if I need those channels I need to pay. Also they did not agree to reduce the package price for the channels removed. It's been more than a month, even their nodal centres are neither responding nor picking up calls. Also they say if I disconnect, the amount will not be refunded. Now neither their customer support is responding nor the Nodal center in spite of repeated escalations. I read this news article but unable to determine the legal recourse.