Airtel — main balance deducted even though I have internet pack

Sir,
I got 1gb 4g/3g data for 3 days... Today when i started the mobile and data and check the speed... After turning off the mobile data... The charges has been deducted from my main balance... There is no deduction from data balance... I lost 47rs todays even though i have still 1gb data unused...
I tried changing from 4g to 3g network type... And again done recharge of rs 10 and start the mobile data... And after starting mobile data... And checking the speed... Again i lost rs7
I lost total (47+7) rs... Rs54

I am your customer from very long time... I never face any issue till today... But the today's incident made me really unsatisfied...

Please resolve this issue... I need my money back that i lost today
Mob no : [protected]