Mark, the best people to contact would be Devil Wear themselves. Having never used them, I can't give you a definite answer. However, I can only imagine that they will review the payment and then upgrade you (manually) to a dropshipping account. As its a Saturday, they may only be in the office from Monday to Friday.
I wouldn't worry, they are a legitimate organisation and have been advertisers here for quite some time. Their user name here is, CFL (you could try PM'ing them, but you'll need 10 posts for that).