Lower part of screen not working

My daughter droped her tab3 kids on his corner and she cracked the glass screen but the tab was working perfect

Already replace it and also have a glass protecting screen over it

she droped it agaiiiiin and cracked the screen but i won't replace it

now the lower 3cmm of the tab is not working

the back and the menu button is not responding and 0.5 cmm of the screen also

some time the whole screen not responding but when press the power button and lock screen then unlocked it work perfect again

when i looked down the back button i saw that the touchscreen isn't correctly attached to the device