Hi @Sivonnah!
I’m afraid I don’t know much about servitors myself as I don’t currently use them, but I do know @MeganB had mentioned looking into them at some point. Otherwise all I can find is the Learning About Servitors discussion and the My Chaos Magick Entry about servitors by @Artemisia (and it sounds like you may have already come across those!)
The videos kindly shared by @BlueAngelite look loaded with info about them- I hope, one way or another, you’re able to find out more! Wishing you all the best with it. I’ll be watching (and learning) along to learn more about servitors too! 
Blessed be!