Can't correct Game Center login on iPhone (or games within)

I have multiple iOS devices. I have two Apple IDs (one for home and one for work) and somehow the home Apple ID ended up on my work phone (iPhone 6+) which then dragged over a bunch of gameplay from my personal accounts. I need to be able to use the secondary Apple ID to play some of the same games in the Game Center from scratch, for work purposes. I am not willing to lose the data tied to my personal Apple ID to do so. I've reset the Apple ID on the 6+ to the correct account everywhere I see to do it (settings, Game Center), uninstalled the game and reinstalled it multiple times, and still it pulls the old game data from the old Apple ID Game Center account. Ack 😟

Can anyone assist?

Thanks in advance.