Trai — problem in channel display

Address:

I35, street no 4, Abul Fazal enclave, Jamia nagar, New Delhi, Delhi, 110025

Dear sir, i am a regular customer of airtel dth, i am facing problem in viewing some particular channels without any error code, rest of the channels are working fine. However promlematic channels are in my subscription. When i call to airtel dth customer care they never check at their level and always force for their executive visit, against that they charge fees of rs 150. When problem is from their side, why customer need to pay for small problems. Sir, iwould like to request you to please help me to resolve my problem.
Regards,
Anis ahmed