Uber India — promo code misleading

Hi,
I had received a message from uber "50% off on next 5 rudes for uberx journey on july[protected]". I booked uberx on july 29th. Bill was 429, bu driver gave only 50rs off and not 50%.

Upon complaining, the customer care responded telling 50% off "for maximum amount of rs.50" which was not mentioned in the message before. This is like misleading customers right??