OFB Underpaid Employee won’t come in to Work – How to Fire or Change Wage?

I have just one employee in my hair salon business (Open For Business expansion), and she won’t come in to work because she’s underpaid. She says something about not coming in if she’s not paid enough. I have a feeling she’ll stay in the list of employees until I either increase her pay or fire her. But I think the only way to do that would be to increase the relationship with her and invite her over, then maybe the options to fire or manage wage will be available.  I went back to the business a few times and I think it happened each time. But suddenly one of the times I went back to the business and called her in, she came in to work! So I immediately changed her wage and I think we’re good now.