Airtel — worst serivce provider

I have been using Airtel card ([protected]) for more that 3 years. For the last two months I started getting pre-recorded calls from Airtel fron no.[protected] more than 10 times a day, though it was registered for DND 4 months back. I complained to Airtel several time but with no luck. Then one day I called Airtel customer care (121) and asked the details about the DND and I was surprised when a CC said that after registration of DND it get activated within 45 days and the registered no will not get and unwanted call for 45 days only and again after that I will have to register for DND again, and again it would take 45 days to get activated.
I shouted on that CC guy and told him that this not the rule, but he insisted on it and disconnected the phone. Next day a my friend told me that Hallo Tunes is activated on no. and immediately I checked my balance and Rs.200 had been deducted from my no. I immediately called Airtel CC and informed them about it and asked them that how they charged me Rs.200/- without my knowledge and I didn't even asked for Halo Tunes and even I did not get any sms or any call from Airtel b4 activating Halo Tunes. The Airtel guy told me to that the amount would be credited in my card in 24 hours and Halo Tunes would be deactivated but more than 5 days have gone Halo Tunes is deactivated but still I haven't got my 200 in my card even after reminding them everyday.
I have inquired about DND with TRAI and immediately I got reply from them. According to TRAI any no. activated for DND will not get unwanted calls till the customer itself deactivate the DND.
TRAI needs to take some serious steps towards this and give some relief to customers.