my logitech keyboard is broken.

my keyboard to my school iPad is broken, and i’m currently typing on the screen keyboard. my typing keyboard has not been typing for nearly a month now. it’s a logitech rugged combo 3 school ipad, and i’ve checked for a broken key, whether i need to replace the keys, clean my keyboard, restart over and over, and it’s getting really annoying to type on a screen board. i’ve asked a teacher and my friends and my dad and it’s confusing. i saw a scratch on the back from when i most likely dropped it at home, but it didn’t damages further than than the metal surface protecting the actual tablet. i’ve even removed it off the case and check if the main tablet is scratched and it wasn’t. how do i fix this? i’ve done so many things and yet i am stuck with this annoying screen board instead of typing casually on the flat surface keyboard.