reliance bigtv – reliance service error

my name is satyanarayana my card no of reliace bigtv 200929697987.i have lot of issues with reliance dth provider like they change plans without concern of customer and recently they added 5 new telugu regional channels to the pack channel like 844,845,846,847 etc.we felt good the service provider added new channels so we can watch more but the problem here is it showing error if i want to watch these channels it shows error400 are it shows black display with voice are hanging of channels so i called customer care about this problem they are telling that it is problem with your setup box so we will send our technician he charge RS175 per vist and he will solve your problem..here my complain is i dont have any disturbence watching other channels i have issue with the new channels they added i even asked them about the same issue but they are simply telling our technician will come if you register a complaint and you have to pay rs 175 as a charge..i didnt understand why i should pay rs175 because if there is problem in my network are setup box my all channels must have lost must have error400 are signal issues but ihave only issue with new channels they added…so plz kndly give ur feed back to solve this issue…thankyou