Vodafone India — balance debited from [protected]

Rs 98/- debited from main balance on 01 may 15 at 0637hrs for downloading something where as i have not tryied for download anything that time. More over i have internate pack then why this is debited from main balance. I called to customer care .they assure me to refund within 2 hrs. After 12 hrs again called because refund was not done. They also assured me to refund which will take some time. But till this time i have not received refund.. why.