Greetings!

I have 3 trumpets with mouthpiece practically embedded in the instrument. I have tried using the mouthpiece remover tool but all it does is gets to the point where I can't turn anymore and the mouth piece looks at me and laughs saying "you can't get me out!"

What other methods do you guys do to remove these pesky things? I don't want to go to the repair shop yet but if I must, I must.