how to get a repair help for iPhone 13 Pro Max in Pakistan

Hello, I have got an iPhone 13 Pro Max 1TB (5G Antenna Band) USA LLA Model which I recently bought one month ago and the phone was working fine under normal usage and all of a sudden after a month I put my device on a charger as per the normal routine and after 1.5 hours when I checked on the charging level my phone antenna band was melted as shown below in the pictures and the screen was blinking from the top part in green color and I was not able to understand what went wrong then I unplugged the iPhone and check what just happened so the phone was not shut down it was just not showing anything on the screen but it was indicating the charging signal as to when I plugged it in again it sounded like the charger got connected. Now I'm confused as I live in Pakistan and here we don't have any official Apple Store or Repair Centre and I've already got it checked from the Dubai Apple Repair Centre and what they said is attached below they said to take this device to USA Apple Repair Centre as the device was purchased from the USA and they said it will be replaced from the USA store only. Now here in Pakistan, I got to know there is an official warranty claim centre in Karachi City which is connected to Singapore Apple Inc. They asked me to pay an extra amount of $775 (138,000 PKR) to get it fixed as they said that this issue is not covered under the hardware or software warranty. My question is then what is actually covered in the warranty?!

I'm super confused and so stressed out that after 7 Years of being an Apple user of every Apple product and being in the iOs ecosystem this is what I'm getting a lame excuse from an Apple repair centre.

Please Help!!!

[Image Edited by Moderator to Remove Personal Information]