I've never worked with Cavecreek, but it's basically the same company as CCBill, and CCBill's support has always been just outstanding, fast, responsive, and very customer oriented. So I wouldn't give up on them yet... call and tell them you're frustrated and ready to leave and see what they can do to help you.

If you do end up going elsewhere, I can't speak more highly about National Net. They aren't inexpensive, but their responsiveness is nothing short of amazing. It does usually take them a few days to get a new account established because they custom build all their servers... which might be the same issue at Cavecreek... but once you're up and running, response time typically is 5 or 10 minutes on any ticket you put in, and you can always reach someone by phone as well.