I also work on a commission basis on top of my basic pay, they've moved the goalposts so instead of receiving an additional £600+ this month, I'm now getting diddly squat.
But anyway, but to the original point. I'm bloody livid and contemplating just jacking it in and looking elsewhere.
Been there mate, lost £800 a few months ago because they changed the bonus structure halfway thru the month. I was FUMING! I was close to walking out, but better to remain civil, do your contracted duty and NO more and look for another job. Easier to get another job if you are currently working.

