OnePlus India — One plus 7t screen replacement

Hello All,

I have submitted my one plus 7t to you guys on 6th of Nov. Firstly it took more than a week for my phone to reach a service center merely at a distance of a maximum 4 to 5 hours. Secondly my screen was heating up and there was internal colour spill partially over the screen, photos were attached as well with no physical damage made. I even let the pick up guy have a thorough look to assure there was not a single scratch on my phone.
It was just a 5 month old phone sir and now these guys are asking me to pay nearly half the amount for new screen for no fault of mine.
Please look into and address my issue.