Trai — unethical business practice

Address:

Bangalore, Karnataka, 560075

I have subscribed to tatasky dth provider. Few months ago i subscribed to tatasky bundled packs which consisted of south india channels, hindi channels and english channels with hd. Now after 2 months they have removed some of the hd channels in english including news channels. On contacting the dth service provider's helpdesk they are asking me to modify my pack and add those channels which i had already paid for. I do not have snapshot of the channels that were part of the plan when i purchased but i used to view these channels on daily basis until i started receiving messages on hd channels asking to pay to subscribe.
Isn't this cheating? If this is how the dth providers operate then what happens to consumers like me? I paid for the channels now it is removed.
Please help!!!