Consumer Redressal

I have a aitel DTH multiroom connection on customer id 3000692431.I had taken a HD connection for my second tv about 7 months back. Since the beginning the quality of the HD channels is not good. There is a video lag.The sound appears first followed by video.there is syncronisation problem between audio and video.This happens only on HD channels. I have talked atleats 20 customer support executives and supervisors and i have recieved 30-40 different callbacks.Twice a technician has also come and visited my place but my issue is not resolved.The call center people dont understand the problem and the technician visiting my place says that the problem cannot be resolved. Now i requested airtel to refund my balance on annual advance subscription that i have paid. They say i will also have to return the two set top boxes and the dish antennae for which they have already charged me when i had originally bought it.They are not ready to fix the issue and they want to arm twist me in either kee