Write every instance down, if there is a union rep or someone in human resources you can talk to, go talk to them. You can also look into labor attorneys (perhaps some may give you free consultations) to see if you have a valid claim for a lawsuit against this person or company. Sorry to hear about your situation, good luck!
Oh, just read that your Dad owns the company. If you have a good relationship with your Dad, just tell him directly. We will know how to deal with it.
