Uber India — Misguiding promo codes

Address:	Mumbai City, Maharashtra, 400069
Website:	help.uber.com

I had received a text message on 23rd January, 2017 from Uber stating that
Dear rider, Save more with Uber Mumbai- here's 50% off on 3 rides! Use code SAVE50X3 now. Promo valid till Jan 27.

I applied the code on the same date for a ride from Churchgate to Andheri.
However to my shock, when i reached my destination, the total amount was Rs.602/- i.e after deducting Rs. 50 instead of 50%.

Kindly refund the excess amount taken from me deceitfully.