Spherion Staffing & Recruiting Call Center Customer Service - Hewitt Associate interview questions

I took and passed several tests online, took over an hour. I interviewed in person, seemed to go well. Filled out some more forms online agreeing to submit to a background check. Took a drug test. I got the results of the background check & drug test by contacting the 3rd party company that conducts them for Spherion. Everything looked fine. But Spherion doesn't have the decency or professionalism to bother giving me a call back. I don't have a clue why they won't at least tell me something.