Vodafone India — vodafone balance deduction

I recharged 150rs into my moms vodafone account which is prepaid on 4th august 2018. Today it shows 0 balance.
The mobile data and location in her phone remains switched off because she uses wifi when at home.
She has not made calls that amount to 150rs neither has she sent any sms.
This is not the first time it has happened but earlier i have given it benefit of doubt. Her number is [protected]. Kindly check and rectify the same.
I had been a loyal customer to vodafone since 2007 but recently due to network related issues and exhorbitant postpaid bills i have shifted to another cellular service provider.
If my mother continues having these issues i’m certainly porting her number to another service provider. Losing 150rs overnight time and again is just ridiculous.