I will teach you a lesson ( when you threat someone)

There are many ways to say this:
as a threat.....with the intention of getting at someone (in revenge)...
W'a gentan konnen.
M'ap fè w konn sa'm peze.
M'ap montre w sa'm peze.
M'ap regle avè'w.

Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words