I'm going to tell some contractor to fuck off and mind his own business
What did the contractor do to make you so upset?
I used to work part-time in my nephews company and this guy is offering less pay.
If you don't want the job you should just be polite about it. You could also negotiate a higher wage with them.
Wow, are you going to help me get this job or not?
If you aren't willing to negotiate a salary then I'm afraid you  should look elsewhere for a job. What a company pays is up to them, so you should keep your head up and keep applying until you find a suitable offer.