Ola Cabs — Ola refund fraud

Ola cabs is running a big scam and cheating customers, when customer takes a ride, fare is shown. but at the end of the ride ola charging more than whats shown !! unless customer changes destination or pick up why should fare change?? they are doing it on purpose, when complained they argue first then issue refund for additional amount in the form of ola coupons!! what the heck hard earned money translated to stupid coupons?? note customer cant use more than one coupon at a time, why not refund to bank account??? Ola is not the only cab service in india, I suspect they are doing it for many customers and making money illegally, they show profit while customers lose their money w/o realising ola coupons can't be equal to hard earned money !!
Ola are big cheaters n refuse to refund when asked to transfer same amount to bank account!! Ola need to be booked under fraud