I'm going to fire my mod
What did your mod do to make you want to fire them?
This mod sucks. You need a mod that does work. He/She adds no value to the team.
If your mod does not contribute it's justified to fire them.  If someone hires you and you don't contribute of add any value, you should expect to be fired.  You should screen your mods before hiring them to avoid wasting time and energy in the future.
That is my point is that it is important to work.
I think you area really left with no choice if the mod will not work. One is expected to meet their commitments.