SpamCop are actually pretty reasonable for most parts, having had to deal with them due to running forwarding mail servers.
Best bet is to fix the security hole (you aren't running Exchange are you? If you are, you deserve it to be honest. Most spam related problems come from compromised installs of (usually pirated) Exchange server (which until recently had a default install configuration of "open relay"). If you don't know how to maintain a mail server, then many people do think with justification that you shouldn't run one.
A computer is a tool. You don't need training to use a hammer. However a server is an industrial powertool, and you do need training to use industrial grinders, welders, etc.
