Need to Reinstall my Hi12 Z8300

Hi folks,
bought a Chuwi Hi12 with Linux Mint, but would like to change back to android & windows 10.
My Tablet is H12 Q64G45160902807.
I would be Grateful if someone had recent problems like me and still has the files to redo my tablet.
Would love to hear from folks that had the same problems with looking for these files.
It says in my Boot bios 1x Android and 2x Linux, need to get rid of that also.
Thanks Folks