Hello and thank you for your question. Please permit me to assist you with your concerns.
The answers that I will provide will probably be somewhat surprising and unexpected, so I ask that you do not blame the messenger.
First of all, I must say that what this person did to you is highly inappropriate, and if you were able to forgive her, you are a far better person than I ever will be. You are a victim here, but you are not a victim of 'wrongful termination'. Under law 'wrongful' does not mean 'wrong', it means 'illegal'--and it specifically refers to facts that are barred under law as being able to be used against you, factors such as your age, gender, race, religion, national origin, creed, sexual orientation or identity, and disability if any. Even if the reason you were terminated was found to be 'wrong', the termination is still valid, so while you can ask that they hire you back, you cannot sue them for wrongful termination. You can, however, pursue unemployment benefits
from the state since it appears that while this may have been 'for cause', the cause was faulty based on your texts and messages.
But what you really have here is a case against her. Since she flat out lied and harmed your reputation, you have a direct suit against her for 'defamation of character' since she knowingly made false statements about you to third parties, and you were genuinely harmed by them (you lost your job). That damage can be attributed to her, and it does not matter if she is an ADA passenger or not, you can sue her for losses if you so choose. As far as losing the contract, if the company does not hire you back, this is not 'your' contract but theirs, and you have absolutely nothing to lose if you choose to sue her, and legitimately so, for your harm.