Airtel — not getting any technical support on error 4 for already subscribed channel

I am using airtel dth services since two years from now. I was watching dd national (Channel no 148) and dd bharti (Channel no 151) regularly. Both of the channels are part of dd pack which is free of cost and for watching this pack we just have to take monthly recharge of 153 inr. While going through the airtel app it is showing that dd pack is part of your pack and can not be removed but since four days i am getting error 4 on all the channel of dd pack. On tv is is showing the error with message that the channel is not subscribed by you. When as per app dd pack can not be removed then why i am able to watch the dd pack. While complaining via app they are just raised service request thrice and closed it without even communicating and resolving the issue. I have sent several mails but no satisfactory reply was received. If problem can not be solved at the moment then at least communicate properly. It feels so difficult to communicate to tiny issues like this which will not take more than 5 min to resolve. But they have already wasted so much of my time and efforts to communicate. Please resolve the issue as soon as possible. If i have to make this much efforts for so tiny issues then i am not going to use dth services any more.