I had this exact thing happen to me, they wanted me to move from a tax free state to LA. I said no and they came back we promised your position to another employee. I said ok I need at least a 50% raise to counter the cost of living and taxes. They balked and thought they could push me into it. I stood my ground to stay in my current position and they had to fire me, which looks bad on them as I had no infractions.

I collected, didn't have to pay back my relocation (over 20k) and had a job that I pushed off until near end of unemployment. Thanks for the free long vacation! I went to China and HK (this is before the chaos) for a few months