Domino's Pizza — Services which committed

Address:

560068

Hi,

This is second time I am writing and till now no response on my complain.
I ordered one pizza from domino's as they committed delivery will be in30 minutes however I got my order 15 minutes delay.
I asked for free they said we will not give free but you will get 300 Rs off/ refund. I called many times they are not refunding amount.
This is very disappointed, it was my first order which I placed.
Hope you understand my concern.
Thanks