Airtel — airtel postpaid - international roaming

I keep travelling to saudi arabia, this time when i travelled on 20th april 2019. I did not take any international packs be it daily or monthly. I checked my plan also that nothing is active. Still, airtel charges me with 649 daily amount for international roaming service.. I want all the charged to be reversed and to be charged on normal international charges as per my usage.

I have attached my plan screenshot and it's no where showing any service activated. And if it's done i should have been notified