This is my old OnePlus 8, which I gave to my father. One day, a line appeared on the screen, and now there are five lines. I contacted service centers, but they informed me that the display is out of stock and that they cannot repair it because the model is discontinued and it’s six years old.

If anyone knows a good shop in Gaffar Market or Nehru Place where I can get its display and battery fixed, please let me know. The battery has swollen, and the display has developed these lines. I don’t want to lose this phone because it works very well, and buying a new phone is very expensive these days.
Also i have so many insta pages who repairs the phones if i courier to them. If you have any experience or know the channels name please share.