Poor service. While booking the cab , they gave me...

Poor service. While booking the cab , they gave me an estimate of Rs 1700 for the trip from airport to Kollam. After the trip , they demanded 2350. Driver gave me a mobile no to raise the complaint and that guy said that the call centre guys are incompetent and I should gave the rate he mentioned. When I asked for the detailed break down , he made up some calculations & told me that I have to give 2150 as the final amount. Finally I gave the amount he asked as it was late night.