I need to know how much it cost my iPhone 12 screen to fix it

I have sent my Iphone 12 for repair recently , I have spoke to one of the costumer service he told me that the price will be reduced depending on what job he does , it is up to the technician he said I paid £220.20 including delivery , I am expected to be less price as the phone is less than 3 months old it is under apple warranty , can you please let me know the final price and refund my money ?

A kind of regards

mr Bekele