Converting Ms Publisher to Libre office files

I have the latest version of Libre Office and I have document I am not sure what verion of MS publisher it is but I need to convert the document so as I can upgrade it.
Please advise me how i can do it. Please use my email to correspond with me as this is far easier for me.

N.b. (a) We don’t actually have your email address, and (b) if answers were emailed, it would not benefit others who might have the same (or a related) question.

Please see Can I use Microsoft Publisher files with LibreOffice?

You can use, an online file conversion service, to convert .PUB files to .ODT. (They support a large number of other options, too.) There is a basic free service, but I don’t know if that will satisfy your need. You can check!