Allied Digital Service Ltd — poor product and false commitment

I installed airtel dth at my home in oct 2017. I was looking for monthly payment option but these airtel guys suggested me for opting 1year plan as it has many added benefits like all hd channels, recording, no engineers visit charges for one year if there is any service complain. So on their words i opted for one year.

Since the day they installed this tdh i am having one or other problem so i am calling their engineers for the problem resolving. After 2months of installation they are asking for engineer visiting charges denying the commitment they gave me during selling this one year pack. Also they are quoting that your package is not under any warranty as it has passed warranty period. So their one year looks like this 7th oct, 2017 to 30th dec, 2017.
If airtel type of brand indulges in these malpractices then whom to trust