iphone is unavailable and wont work with itunes

If your iPhone has iOS 15.2 or later installed, check out this link→How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support. Otherwise:

See this Apple support link→If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

Or watch this companion video ⬇️

After restoring the phone using one of the methods above you can restore your most recent backup.

Click here and follow the instructions. Restoring the iPhone requires plugging it into a computer with iTunes installed, or a Mac running Catalina or newer.

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Did you follow point by point the instructions in the links that have been posted? If you did please list each step you did, and what happened after you did it.