Vodafone India — balance deducted on account of data usage

Balance deducted on account of data usage without data pack. But i didn't switch on the mobile data at all. I never use mobile data at all.

Checked with customer care, they say they cannot help it as there system shows usage of data. This is simply cheating as i dont use data at all, and the time of data usage mentioned at that phone was not used at all for any call /sms.