Airtel — Number hacked

I am using Airtel number [protected].
As it is corporate number, it is used for promotion and available on sites.

I found something strange since 9 th Oct. Someone did shopping from my Ajio wallet for Rs. 6000 . I even did not received any confirmation SMS .
This person hacked my Airtel account and logged in my Ajio account through OTP which he is using since 9 th October. He is accessing SMS services of my number. I have not received any message from 9 th October onwards.

Kindly Airtel do needful. I am having his address and number which he mentioned for delivery of items on Ajio account. I have taken the screen shot.

Regards
Mrs. Priya Tyagi
[protected]