Sounds super toxic.
I strongly agree with what Trauma Columnist outlined above to consider for your situation. Just keep your eye on the goal, and you won't have to see them after ever again.
DISCLAIMER—-if any of the following below jives with what you're going through, then I hope it's been helpful. But if I am way off base, you can disregard it. Also please forgive me for the formatting and errors, I'm writing from my mobile.
—It sucks to have to keep things superficial but its to protect yourself. I definitely wouldn't share any more of my thoughts or opinions. Anything you say will be weaponized against you... like it already has been.
It's natural to want to build meaningful relationships, but because of the hostile environment. some may befriend only to gather intel for further abuse. So it's imperative to vet everyone before opening up and don't try to "win them over" because thatll mean you're becoming more like them, and less like yourself.
you've been targeted by a narcissist(s) and their enablers (supporters).
and it looks like they wasted no time in a smear campaign against you.
This isn't going to be easy, but the BEST thing you can do at this point is to go what's called "grey rock". (Do a search on that)
KEY POINTS:
GASLIGHTING is the game, don't play it!
Do NOT defend against false accusations. Do NOT react.
Do NOT call them out on their toxic behavior.
Doing any of the above will make things worse.
Grey Rock all the way
They're going to say all sorts of things to get you to react. Do not defend that which is untrue, they're not looking to understand so the more you plead your case the more guilty you'll look. Just Like when they accused you , then taunt you "you know what you did" -they WANT to see you get frustrated, emotional and defensive. It's a twisted and sick game but this is how some people get their jollies off.
Remember, it's YOUR reaction they are looking for, so don't give it to them!!
It's a sick game you didn't sign up for or want to be in but you react, they win and the abuse will continue.
Things may get worse at first if they decide to ramp up their toxicity. But narcissists need supply like an addict needs a fix. You stop being the supply when you stop reacting. Eventually, they'll get bored with you and you'll see they move on to another target.
Stand firmly in who you are as a person, know who you are as a person, and be confident in that.
Narcs have no identity, and envious of those that do.
TLDR, haters are going to hate. Let them.