Uber India — Refund of extra payment

Address:

New Delhi, Delhi, 110045

I received from ur side few rides of flat 50 rupees off last month (April) as well as this month also. Last month i got a code also but this month i received a sms for this. But u guys charged full amount. Despite i apply code, u even then charge full amount.
I m regular user o[censored]ber so please refund my money back that u charge extra.
Thanks
Sandhya bhardwaj