Legitimately, no one can or should refuse to hire you or give you a raise for the quality of your work due to the stammer. That's outright discrimination. But a

Legitimately, no one can or should refuse to hire you or give you a raise for the quality of your work due to the stammer. That's outright discrimination. But as you've seen, that's how some jerks act when they know they can take advantage of you. There was a brilliant invention I saw a while ago that replays your own speech to you at a slight delay through headphones. This forces you to listen to your words as you speak and so you slow down to catch up to it. Over time, this improves your speech to a point where you may be able to leave the headphones behind and speak without aid. I wish I knew what the invention was called or even where it's available, but hopefully someone here has heard of the same. This is the only device I've seen so far to actually cause near-instant improvement in speech.