Ola Cabs / Ani Technologies — Iam complaining about consumer service

We have booked cab for outstation which is nearly 100 kms. The car has arrived at our home at correct time. But the driver bargain me about 500 extra from bill amount. He tells about that it was an tax. But we paid the bill inclusive of tax. *His name is Mariappan*
From TOYOTA ETIOS . TN23CA7771. Please take an action as soon as possible. Thanking you