Airtel — charging heaps of money for services not downloaded

Address: Bangalore, Karnataka

I have a airtel prepaid connection.
Once in a month, i get a message on my mobile saying you have been charged 20 rupees for some download or some service which i never even heard of. Customer care is very poor and they dont repsond at all. This is happening to everybody i know who have a airtel connection.
Please dont go for airtel mobile connection. I lost quite a bit of money because of this.