[Resolved]  Airtel — Promotional Call

I am getting promotional calls from Airtel at 12 o'clock midnight. what can be a worst nightmare than this. Promotional messages are arriving at 2 at night. when i called customer care to stop all these promo calls and messages, they said it will take 45 days to stop this service. I want to know what kind of service these companies are providing and are they in 70's that stopping a service needs 45 days time. It is just that they want to continue with their promo for another one and half month. I am fed up with this kind of response from so called India's fastest growing Mobile service provider.