I suppose one could argue you have a libel claim and that your reputation was damaged.
The real question is do you want to continue living there?
I would take up your case with the property owner and ask for an apology and perhaps a small rent discount for the next month.
I really don't like the idea of suing someone when you live in his property--that's just asking for trouble.
Libel claims are long, drawn out, and really hard to prove. I think you would be better off trying to work out a settlement with the owner.

