Ola Cabs / Ani Technologies — I was charged more fair than shown in app

My name is gaurav nahta mobile no is [protected], i had taken a ride from green park to airpot in delhi on 29th april 2019. in crn [protected] in prime SUV. I was shown the charges of around 300 but i was charged Rs. 789/- without any reason. please let me know the reason. your app has no support system. It is the worst app seen . They dont responds to complaints, they dont have an email written there, they dont pik up phone, phn no is not updated. I am going to file an complaint in all forums regarding the non disclosure and cheating done by ola. The no which they have given on app does not responds.