How do you say: That doesn't matter I don't know what you are talking about I don't know what to say Thanks in advance!

That doesn't matter.
Sa pa fè anyen.

I don't know what you're talking about.
Mwen pa konn sa w'ap pale a.
Mwen pa konn anyen sou sa w'ap pale a.

I don't know what to say.
Mwen pa konn sa pou'm di.
Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words