All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah and that Muhammad is His slave and Messenger.
There is no harm in working for this company as long as the job assigned to you is lawful. The fact that the company ships workers overseas to impoverished countries and pays them low wages has nothing to do with your job.
There is also no harm in wiping the dust off the shelves and the like; this does not humiliate you at all. In fact, if you carried out these duties with the intention of doing your job exactly as required, then hopefully you shall be rewarded for that; the Prophet said, "Verily, Allaah loves that when one of you does a job he perfects it." [At-Tabaraani]
Allaah knows best.