Vodafone India — international activation for my no without my permission

Address:

Nashik, Maharashtra, 422003

This is to inform my no is [protected], we are using corporate plan for our hote use but you people are activation any offer with out permission we came to know when we received billing. Why this things are happening. Without my permission you people have activate international roaming which cost me 2500 rupee which is not a small amount. please make sure this things should not repeat it again in future. expecting a call asap