Airtel — airtel billed me over credit limit

Address:

Mumbai City, Maharashtra

Hello,

During my travel outside India, without my knowledge international roaming setting is activated from my Airtel Network on my mobile number.

Now, during my stay I was able to receive calls from India and answer them as usual.

During the usage, Airtel never intimated that the usage of Airtel services is being charged over my credit limit. Now they have billed me 5800 INR and expect me to pay.

I deny this as it is a mistake on Airtel that it denied informing me while approaching the credit limit or while exceeding it.

So, please help with Airtel in resolving my issue.

Thanks,
Varun