Tata Sky — violation of trai guidelines and change of pack abruptly

My subscriber i'd is [protected] and my registered mobile no. Is [protected]. I subscribed for one year dhamaal mix pack in august 2018. I want to remain with the one year pack which was paid by me on 16th august 2018 and valid till 16th august 2019. But from 31st march 2019 tata sky abruptly and without my consent discontinue some of the channels subscribed and paid by me in advance which is highly objectionable and against the policy of trai. Also the validity of the amount paid by me is reduced by one month. I contacted tata sky frequently but they refuse to resume the pack.
So far the new guidelines of trai is concerned the guideline is quoted below. Plz refer point 11 at page no. 6 of frequently asked questions in trai.gov.in which is quoted below :
11. What if annual subscription charges are paid by a subscriber in advance? In case a subscriber has availed any scheme with advance charges paid for future lock-in period like an annual plan the distributor shall continue to provide services for such committed period without any increase in price / charges and without altering the other terms of subscription. The distributors cannot make any changes that entails any disadvantage to the subscriber in such cases. However, if the subscriber wants to switch over to a new package after 1st february, 2019 then the proportional balance amount of existing package as on the date of switch over may be adjusted for the new package prices after 1st february, 2019.

In the view of the above discontinuation of my 1 year pack effective from 16/08/2018 is clear cut violation of trai guidelines.