From what I can see on the pictures, my guess is that the '''ribbon cable''' that goes between the screen and the rest of the device has been '''damaged'''.
This because there isn’t really anything that can protect it from tear when the protective case is broken and the ribbon is what holds it together.
What you could try regarding the '''case''' is to use '''super glue''' to put the '''broken pieces''' together, just be '''CARFUL''' to '''ONLY''' '''PUT GLUE''' on the places where it has '''CRACKED''' and not to get '''ANYTHING ELSEWHERE'''.
If you are lucky and not too aggressive when using the device this will probably work, otherwise, you could look after a '''broken device''' on the '''internet''' that has a '''good case'''.
You could also look if you have anyone where you live that have a '''3D-printer''' and ask them to '''model''' and '''print''' a new case for you.
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'''So I think you need a new ribbon cable then first try to glue the case together and if that dosen’t work, look for a replacement.'''
Hope this helped![br]
// eke0909 :D