After you file

I have a similar situation. I moved to Florida from California in March 2020 and have worked remotely for a CA company ever since. I documented my new address but it still said my new address was in CA. I was charged California state taxes until August 2021 when I noticed the error and fixed it on one of our (arbitrary) employee portals. My paycheck immediately changed after that. My company is refusing to issue a new W-2 because they’re saying it’s my fault that my address was wrong in the system (my full address was right, including the zip code,  except the state and I received my 2020 W-2 at my correct address so it must have been right somewhere). I imagine I won’t have much luck getting my 2020 withheld income back, but I haven’t filed my 2021 taxes yet. Tax professional said they cannot do anything until I have a corrected W-2. How do I proceed?