Airtel — automatically deducted amount from balance

Without intimation mobistore service activated and deducted amount from my balance i didn't seen the message. So i called to customer they informed we are not refundable the amount. So i kept a port to another n/w. So my suggestion for all airtel customers don't kept balance in your account they deducted amount with out any intimation. And i asked for other airtel customers they are also getting same problem. So i think port is only option but my friends and all other airtel users suggested we need to give complaint on this because it's not only me it's deducted so many airtel users with out intimation, so they are blaming the customers i think they get huge amount in their accounts it's looks like another scam.