Thank you for your question. I look forward to working with you to provide you the information you are seeking for educational purposes only.
You need to go back to work, first and foremost. Second, you need to write a letter to the employer to put them on notice that you have never had "performance issues" prior to bringing up your ethical concerns to management as you have a duty to do and that you are giving them notice that you are now being retaliated against for following the law and bringing these concerns to the employer.
You also need to focus in your letter in response to their allegations on the facts and point out each fact you claim is false and provide evidence to them of how the fact is false.
Once you have put the employer on notice in writing, not email, but a letter to HR and the President and VP as well, then if the retaliation continues, your next step is a complaint to the EEOC
, since you have documented your ethical complaints and have also notified the employer you are being harassed and retaliated against for raising those concerns and the retaliation continues. The EEOC will investigate and has to grant you a right to sue letter in order to go to court.
Quitting your job or not showing up to work would hurt your case. If you do not go to work, they can have good cause to terminate you and you would not have any recourse. If you quit before trying to resolve the matter through the administrative process available, including internal and the EEOC, then this too can hurt any case you may have as it would show you did not take any steps to try to resolve the matter.
If you cannot get the employer to stop and you go to the EEOC and they give you a right to sue letter, then you can pursue the employer in court for hostile
work environment and retaliation and their continued conduct towards you is what strengthens your case and makes it more valuable.