Struggling to get unions undone

[Matt]

I'm stripping my rear beam off and some twat has rounded the unions. I've coated with wd40 and used mole grips to undo but to no avail

I was thinking can I cut the line, where the female Union is then attach a female and male to the line then have a bit of pipe to another set of male and female unions which then connects the the existing pipe work. I really don't  make up a new set of lines