Switch from touchscreen keyboard to manual keyboard

I advise downloading the user manual from:
https://www.irulu.com/download-center-new

tablet key board troubles

The keyboard has to be USB or wireless BT.
Read the manual. Amazon com keyboard for apple ipad air

As the keyboard is part of the touchscreen your question doesn't make sense.

The touchscreen or an external keyboard? If it is the touch screen you may try an external one to try and find new drivers for it unless it is under warranty in which case return it.

Your on screen keyboard should have a button labeled ?123, after pressing this to switch to numbers/symbols, press the Shift key to change to additional symbols.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/daniel_e90a831f4dd5fc5d

Bluetooth

first repair touchscreen and then set factory settings.

Go there :
http://pc-dl.panasonic.co.jp/itn/drivers/d_menu_en.html
Choose your model, OS, language.
Download the calibration utility pertaining to your model (Touchscreen or Digitizer).