Waiting on Payments

I love working for myself, I really do. However, what I do not like waiting on are payments from clients. Keep in mind that most of the places I freelance for are companies. It's not as if I'm working for Bob down the street and he hasn't paid me yet. For instance, one place I work for has been supposedly loading my debit card since the 10th. That has almost been a week and no money yet. It's not a ton but it's around $55 and that's not exactly McDonalds money. Oh well, wish me luck on this one. I wrote them and plan to call tomorrow.