That sounds familiar, I was lied to at interview once, went round my boss eventually to get the money I was promised, he never liked me after that.
The icing on my cake was a bigger pay rise than originally 'promised'.
Lesson . . .get it in writing.
Most of my difficult situations have been made by other people, ie redundancy. It happened 4 times in the 90's, quite often a step down to get back on the ladder.
Best decision I made was going back to work Nov '19 after 12 years running my own business. Also as Scooter1 Says, don't burn...