We are sorry to hear about your concern and experience with the recent updates on your Samsung Galaxy Z Flip having issues with the screen not responding when you try to use it and flip it open, and we apologize for the inconvenience it caused you.
Since you have tried all available means to restore it to normal function but to no avail, I highly recommend bringing it to the nearest Samsung Authorized Service Center in your area. Rest assured that our Samsung engineers/technicians are competent to assess your device, offer suggestions, and provide prompt solutions to restore it to optimum performance.
In the meantime, you may submit an error report through Samsung Members app as follows:
Step 1. Long press Samsung Members icon on Apps screen and tap Error reports.
Step 2. Tap OK on agreement popup to send system log data.
Step 3. Select Symptom category "Settings/System".
Step 4. Describe the problem in details and SEND.
How to submit an error report on Samsung Members app? | Samsung PH
For more assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.