Calibre and online sites can convert from PDF to Epub usually lose most of the format. I tried PDFElements, with similarly poor results.
Is there any service/app that actually works and converts a PDF to Epub in a way that resembles closely the original?
Maybe try converting the PDF to another file type, such as Mobi, first and then epub?
Not sure if that’d help but it’s worth a shot.
It won’t. EPUB as a format defaults to being a reflowable document, if you have fixed content, it needs to be defined and flagged as such.