Airtel — amount 99 deducted

Address:

Kangra, Himachal Pradesh, 176061

I am using Airtel himachal number [protected] in UAE.Today I got a msg that i have been charged rs99 for international rental, i didnt even opted for any such service. I havent received or made any calls. Not even texted. So would like to know the reason of deduction and want refund. I am using this number since long time and never faced such issue before as used same no. even in Saudi Arabia.
My alternate no. [protected]
Sourav