Oh, I'd be so mad! Here you've forked out good money to get a nice sewing machine and now this! That's bad enough, but the run-around you seem to be getting is unacceptable!
Do you have a consumer help person? Someone through the newspaper, tv news or a talk radio that you can turn to? If you do not hear from UPS soon, call them and let them know you will be contacting these people, then do if it doesn't spur them to action. Often a call from a person or place like the consumer help person will get a pretty quick conclusion.
OK, off my soap box now!
Meanwhile, I'm so sorry your sewing enjoyment has been so affected!