Remedy Intelligent Staffing

I got sent to a printing company that doesn't train you.I made one mistake and was let go the next day. Then come pay day I was shorted on my check by not getting the correct rate of pay..then on the next pay check today I was shorted again, wrong rate of pay. I tried calling to resolve the situation and kept getting voicemail. Is it too much to ask to get paid at the pay rate they hired for that particular assignment?!