Airtel — automatic activation of stupid vas

Address:

Ahmedabad, Gujarat, 380058

Whenever i recharge my number or keep a balance of more than 5 rs/- you people deducte an amount saying activation of vas, may i know how will i activate any vas while driving a two wheeler or while having bath??? These msgs occur at this time and i cannot do anything after that as the balance has been deducted. Kindly let me know why you people are activating such services???