Videocon DTH — Signal not available

I have videocon dth connections last 5 years, i was subscribed tamil package, customer i'd[protected],
Display shows no signal, i was check all cable, and switched off dth 10 mins and restart 3 times, spoke with ur customer care also, no problem in kannada channels, when i change to tamil it shows no signal, when i call customer care they are not give any solution and disconnect the call suddenly last 2 hours i was do this follow up only, please solve my problem as soon as possible