Totoodo.com — I'm complaining about the refund

I have given my sony Xperia xa ultra dual for display at whitefield varthur road yesterday and I didn't receive bill[protected] from the store.
On[protected] again there was problem with the display touch was not working.so I have visited the store again and he told that 50% refund as he could not fix the display.
My concern is as the display is not fixed and I'm facing the loss of other 50%
I was suppose to receive the refund today but when asked there was a rude behavior from your the employee and extending the date to Monday.
Request you to help me on this issue.