Recovering documents from Windows XPS documents is problematic at best. The XPS format is designed for printing and not for recovery, hence what most programs advertising xps to doc conversion achieve, is that they just grab (or in better case OCR) the text from .xps file and save it in a new document, typically without any formatting.
Articles and other information relating to xps into doc conversion:
How to open, view and convert XPS and OXPS documents on Mac - Apps and on-line services for viewing and converting XPS, OXPS documents