Vodafone — unfair deduction of balance and inconvenience caused

My number was deducted of rs 99 as international roaming.
Vodafone arbitrarily initiated to deduct balance from my main account without my request for any international services.

I do no want any international roaming or international service.
I want to be out of your default balance deduction schemes.

I'm reaching out here because vodafone customer service has no answer to this issue.

Please let me know how to unsubscribe from your default scheme of balance deduction without any request from the users.

Why did this happen in the first place?