saying that if I don’t create an account then they will do it for me
I would report the hell out of them, both to Facebook and HR. That’s literally the definition of identity theft.
Although the point is kind of moot - because of all the people who know you, that do willingly share their everything (including their phone contacts, photos etc), Facebook already has a You-shaped hole, even if you don’t have an account.
So when I got pressured into creating a Facebook account (not as badly as you were though), I was so creeped out by the amount of data they already had on me, I immediately deleted my account. It felt like being invited into someone’s home for the first time and seeing a stalker shrine dedicated to yourself.