Disappointed by the app – WPS Office Review

I used to use this app a lot and it was my only app for reading my university books but since two days ago it keeps saying that my book is damaged and it cant open it. Its a disaster for me cuz i highlighted the book for whole year and now all my savings are gone unfortunately the keep saying to send feedback but they don't give any answer. Im going to delete the app and never reinstall it again.
Review by Faeze2016 on WPS Office.