I did trim for my stinger to stop spinning and nothing happened

There is a roll pin that holds the trigger in place. Remove the roll pin with a punch or a nail filed flat. The trigger valve will then come out. Clean, lubricate and reinstall. It should work.

Look for a trim setting or reference trim the users manual. It is usually a dial on the side of the remote.

did it happen after you cleared a clip? there should be a release mechanism to clear the slide.

i got a new model havoc heli and the trim buttons did not help at all... in the end I took a motor/prop off of an air hog styrofoam plane I had that was identical to the havoc heli tail rotor and swapped em out.. Problem solved... there was some sort of error with the tail rotor

Adjust the trim on the side of the remote.

Trimming Air Hog Hawkeye

the propeller is problay bent. check

This might help:
http://www.spinmaster.com/files/instructions/AH%20Havoc%20Heli%20IS%20R1.pdf

theres trim on the remote just hit the r until it stops spinning to the left and it it spins the right then hit the l

I have an Air Hogs havoc cyclone stunt plane. I am not sure if your plane has this, but on my plane's remote there left and right steering trim buttons. Play around with these until your plane flies correctly.