Apple India — Iphone 11 Screen run- on brand new phone

Address: mumbai

I have purchased a new IPHONE from Vijay sales on 3rd of January 2021, i started facing issues with the phone on 7th of January 2021, i report that to vijay sales, Apple store is now sitting upon the issues that is till date[protected].

My question to Apple : why should i take a brand new phone for repairs.
Why i wasnt provided a replacement on the same day the issue was reported.
Why is apple store taking so much time to resolve the issue ?