Airtel — excessive bill on my account

Hi team,

I need legal suggestion on how i go about this. I am seeing that the airtel is charging me a day pack of 649 rupees for 21st 22nd and 23rd december 2017. I do not see any sms details in my itemized bill when asked they have sent another bill which includes sms details which i think is fraudulent. How can i go about this and get them to court? I am in canada now, so need clarification how to do this.

Thanks,
Raghavendra myageri
E: [protected]@gmail.com