Most Karwa taxis have 4 digits only! And I have encountered a month ago this type of arrogant driver. I called up Karwa hotline number 4458-8906. Then I go to their website and filed my complaint.

http://eng.mowasalat.com/site/feedBack/Registration.asp?cu_no=1&lng=0&qu...

You should specify the DATE, TIME, PLACE and ARGUMENT where it happens. Because there are TWO drivers using that taxi on shift basis.