Then, unless you have an interest in learning repair, I'd recommend getting a replacement device. Definitely contact Ledger support and see if they'll offer repair or replacement first though. Costs nothing to ask.

Once you've sourced a replacement device (be it Ledger or something else), simply load it with the seed and away you go.

Once you have your new device setup and working, then if you decide you might want an "emergency backup" device, you can always try sourcing a replacement screen and giving it a go. If it doesn't work, you'll be out like $10 (for screen+shipping). If it does work, you will have a cheap backup device.

For now, I'd definitely stop using the current device to prevent any further damage unless you have a super urgent need to move coins (and even then, I'd recommend other solutions)