I agree with DanofNJ, don't give this lemon to another sewist and cause problems for him/her. Off to the landfill.
Go buy yourself a Janome, Brother or Babylock. They run forever...not sure about the Brothers from Walmart though. I have been told they are different than the Brothers sold at sewing stores. Plastic parts again...ewwww. Sorry you had this experience, but I had a similar one with an $8000.00 Pfaff, yes, eight thousand dollar Pfaff. Just because you pay big bucks doesn't mean you get a good machine...sorry to say.