I had an unpaid internship here in 2010. They late...

I had an unpaid internship here in 2010. They later offered me a job, but rescinded 3 weeks after without paying. Their reasoning was the marketing money hadn't arrived, and suggested me to work for free until the fund arrived - of course, I declined. I learned that they continued to use free interns the years after - this company is known for using free work.