Trai — daylight robbery by tata sky

Address:

Mumbai City, Maharashtra, 400050

I am a Tata Sky DTH user. I had bought annual mega pack for 1 year in August 2018 and purchased all of their channels(I selected every channel on offer). From April 1st they have stopped airing SD and few HD channels for me and have also changed my due date for next payment by 1 month to July 2019. I cannot understand TRAI's ruling for existing contract done in August 2018. These decisions cannot be retrospective.
Please intervene and resolve the issue.