Whenever someone acts that way toward you try to stay calm and smile. They are out to ruin your day because they didn't get a big commission of a sale. Then I would turn around and walk out never to return.
After all you are who keeps them in business... The Customer. Boy, how many times do they have to go out of business before they remember that?
I am so sorry that you were treated so poorly. And so near your birthday too. The big meanies.
Check on ebay. There are persons who sell the manuals for all types of machines and the feet too. Also sew and vac has some things there.