Just got out of college with my college degree in ...

Just got out of college with my college degree in engineering. I came upon hard times, and applied for a job with PDSI. I submitted a resume and was declined. So I called up some guy named "Adam" to discuss my resume and my skillset, he would not listen, told me I'm not a candidate because of a recent background check came back and he won't let me have a job in the industry. I tried to discuss the situation, but he would not listen at all, told me not to call this office again and was very rude.
I am actually considering legal action against PDSI at this time for discrimination.