My form of revenge.
How would I get payback? Simple. I'd forget about asking the cops for help for one thing, as they cannot be trusted. I'd steal the drugs from the crooked cops at gunpoint (like they did in the movie) dump them in the ocean to get rid of them quickly (this isn't about making money), then make an anonymous phone call to Donatelli a couple of days later saying that Parnell and Scalise have sold your drugs and are planning on fleeing the country with the money.
They'd have to find a very large sum of money in a very short amount of time (almost impossible to do without being caught), that's assuming Donatelli didn't have them killed first.