I applied for a job and they were offering a decent amount for the skill set I have. I got the job and was put on a casual salary until I acquired a specific licence needed to work on my own. The week I acquired the licence, I let them know that it was time to re-evaluate my agreement. They came at me with an offer 30% less than advertised and got upset when I grabbed my shit and walked out. At least try to come close to the offer.