Airtel — Complaint against the billing of airtel gprs

I am Airtel postpaid customer ( [protected]) for more than 10 years. I was on international travel for 4 days (3rd to 6th April 2023). Last month, I received a the bill with GPRS charge approx Rs 4300. I never activated any international roaming service or GPRS.

I was not aware GPRS was activated until I get the Airtel bill. Now I am sending mail to 121 mail Id, I am not getting response except Acknowledge. And customer care is so helpless, they have only sentence - :"International roaming pack was added automatically for your security purpose. Bill is correct, You have to pay".

I did not request them for this service nor they haven't provided me any service during this period.

Seeking you help on the issue.