Merc Dissapeared Randomly

Hello, I just noticed after getting an alt past the campaign, that my merc has disappeared. They no longer exist on any character, town, map, hideout, etc on my account. so I'm unable to hire them. I did not touch their menu, fire them, or anything. Is there any way to fix this?

Sadly, there is no recovery for this and GGG almost never restores anything lost by accident or due to a bug. You have 3 merc slots and if they aren't anywhere among those 3 slots, they're gone.