Wiko Cink slim : how to debugging mode without screen ?

Hi,

I need you because my sister's phone is broken and she would get datas ...
This is a Wiko Cink slim.

Phone is working but the screen is only black.
Debugging mode if off ... so i can't activate it to save datas.

Programs need the debugging mode to work.

Do you have any idea to help me please ?

Thank you ... :)