are you sure 4121 is your NOC? Have you carefully checked your job duties with this NOC? It is higly unlikely that you will get away with a wage that is below the minimum. From reading this forum I've learned that your wage should be at least average or close to average. If you can show a very good reference letter from employer matching all the job duties then you might get lucky with a wage that's below average. But my friend your wage is $12/hr and if the min rate for your NOC is $20/hr, that sounds like trouble. Again, I'm no expert. Other seniors might give you better insight and if I were you, I'd consult a lawyer.