Airtel — did fraud with me

Unexpected balance deduction from my account. And i did recharge from my airtel app and it has been done by mistake and no help through their executives and balance deduction from my account unneccesarily and refuse to refund back and same in this recharge. I'm getted frustrated from this company and no more want to use this network. I want to port my number and i had take my port code from network at that time they were just like ya sir we will do what u say but after that as usual they are