BSNL PREPAID MOBILE GUJARAT CIRCLE — deduction o[censored]nspecified charges

Address:

Kutch, Gujarat

I AM USING 3G SIM CARD ONLY FOR COMPUTER APPLICATION SINCE SAME IS ACQUIRED. TIME TO TIME I GET DATA RECHARGED.
BUT BULK DEDUCTION OF CHARGES TWICE FROM MY MAIN BALANCE IS NOT UNDERSTOOD.
I DONOT KNOW HOW TO AVOID SUCH DEDUCTION.WHEN APPROCHED PESSONALLY COULD NOT GET ANY EXPLANATION.
MY MOBILE NO, [protected]
HOW I TOKNOW WHY SAID CHARGES ARE RECOVERED ? AND HOW TO STOP SUCH DEDUCTION?
AROUND Rs> 150/- IS DEDUCTED WITHOUT ANY REASON.