I dont really understand how there would be no path available to raise my own legal action when a notice is served on me making me think i need to leave my home in 2-months when i dont, it has caused allot of stress...basically i am just to sit taking anything they throw at me, legal or not, and cant hit back with anything?
Absent an actual breach of an agreement or a crime, there are two routes to make a claim against someone*.
One is for breach of contract - someone's agreed to do something and hasn't done it (or agreed not to do something and has done it).
As far as I can see, you have no agreement with the agent, so they can't be in breach of it and claim compensation.
Your agreement with the landlord probably doesn't cover this.
There are claims in Tort, where someone does you a wrong, causes you a reasonably forseeable loss and you can claim compensation on the basis that they shouldn't have done that wrong.
But the agent didn't do you the wrong, they simply did what the landlord told them to do (presumably), which they're obliged to do.
And the landlord simply made a mistake, sending you an invalid notice.
You could probably argue that that caused you some stress that it shouldn't have done - but probably not more than if the notice had been valid (and the landlord is allowed to send you valid notice). And the landlord didn't send you an invalid notice to cause you stress, he sent you the notice to get you to leave - which is stressful.
What you can do is sit there with the invalid notice and not tell anyone.
*Obviously anyone can make any kind of legal claim against someone else - it just won't go very far.