How do i kick a bridesmaid out?

I am getting married September 29, 1018. I’m stuggling SUPER hard. I have already asked my bridesmaids but one of my bridesmaid was a total fringe, I shouldn’t have asked her but I work with her and I felt obligated since I see her everyday. She brings her drama to work, would be crying at work constantly about how her “boyfriend treats her awful” and would then come into work the next day saying he’s the best guy ever and she wants to marry him. Long story short, he finally kicked her out, she now has an older boyfriend, as in almost 40 and she’s 23.. she constantly calls into work and screws me over when I’m doing her job and my job. She’s always late, always trying to tell me what to do in regards for my wedding. I’m just very annoyed and I know she will try to steal the show at my own wedding.. I’m not close with her anymore (if I ever was) and I’ve become close with another one of my friends that I didn’t ask to be in the wedding initially. My fiancé wants my other friend (that wasn’t originally in it) to be in it over my coworker and I feel the same. Does anyone have any advice?