Vodafone India — postpaid billing of an number

I brought this post paid number in my office with mobile number [protected]. My name is arpit patil working for amazon.com raised the complaint privesly also

which was

Next one is that every month my number vodafone is charging 499 rs for data usage of some 30 mb the problem is i brought that sim for my mom she never uses inter net it might be by mistake data may got on she uses only for calls so i request you to wave off the internet charges or help me to port to some other network

still no resolution from Vodafone