Uber — refund not received

Address:

Hyderabad, Andhra Pradesh

on 24th may 2015 i took a ride in uber cabs and since it is my first ride and a 400 rupees promotional benefit was added to my account. My ride costed me 283 ans because of promotional offer the app showed me to pay zero (rs 0). Initially i said because of promo code it was shown zero so no need to pay but he somehow manipulated to pay the amount and later i found that i was looted. when this issue was taken to uber customer service they had responded upto some extent and when i asked for refund they were not responding