Airtel — disconnection of dth channels without info. n poor customer care service

Hi, ours DTH customer id.[protected] was full charged by RS. 300 on 09.02.19 with our continuing plan howerver on 18.02.19 some of the news channels, music channels, child entertainment channels have been discontinued without our approval of change in plan. Also when trying to use TRAI rule either the customer care is not reachable or the site is designed in amanner making things complicated for common man.
I'm unable to understand that when we recharged all the channels were a part of our pack n how come during the course of term some channels r discontinued.