Meru Cabs — charged incorrectly by the driver

The driver charged 100rs more from me. I booked meri cabs for the first time. After the ride he told that the bill is 988 and took 1000 rs. He said i will receive a message after 15-20 minutes and not now. But later when i received the mail it was of 888. The driver charged 100 rs. More from me. It's a cheating and this has disappointed the rider and created a very negative image.. Do look into this. I took the cab on 9th september. From t3 terminal delhi to east of kailash around 12:20a. M.