Airtel — activation of hello tune without request

On 22nd february, 2005 I received two sms saying I have requested for hello tune, that I never did. Second sms said that a tune I have selected is activated, again I havenot done or requested for this.In consequence they deducted rs 40 from my balance without my request or confirmation.

I tried to talk to customer care from 8 pm to 10 pm, they were not responding. At last they picked up saying the system is shut down, so I should wait for next 48 hours to get any response from them. I am confused what should I do and where should I escalate this matter.