BSNL
Illegal deduction from vas

I am raghunandan kundu .my mobile no: 9434337186

voice chat service from this operator (12630035) has activated before 3 months .i have deactivate it by deactivation process and got feed back for deactivation.but still deducting from this service @rs30/- gradually. i have compliant but crocodyle tears. kindly help me to refund my money as soon as possibile