Vodafone India — incorrect international roaming charges

Vodafone charging exorbitant international roaming charges - exceeding rs 1800 in mere weeks, when calling customer care - they send us a list of numbers that have contacted my number, which makes no sense, as none of the calls have been answered, as we have sound knowledge on what charges incur, if you answer a call, while you are in international roaming - this number has been used by my brother for 6+ years at papua new guinea and this is the first instance we are facing. We switched off the phone and still the bill kept building and the account balance finally went below rs 100. What does vodafone have to say about that.

We need a refund on all the incorrectly billed transactions - you may even block our incoming calls, as we only use the number for otp.