Hello and welcome to JustAnswer.
I'm sorry to hear about your situation and hope I can help.
Unfortunately, as an at-will employee, your employer can require you to transfer as a condition of continued employment, even though the transfer is unjust and based on wrongful allegations of discrimination.
This rule stems from the at-will employment doctrine, which is codified in California Labor Code Section 2922, which states:
"An employment, having no specified term, may be terminated at the will of either party on notice to the other. Employment for a specified term means an employment for a period greater than one month."
However, you can sue the complainant who is accusing you of discrimination for defamation for making the false and damaging comments that caused you to be transferred.
You can find an attorney online here;www.lawyers.com
I suggest that you hire an attorney on a contingency basis, so you only have to compensate the attorney if you receive a settlement or a verdict in your favor.