Here's a general rule of thumb for bans like these:
If you are banned within 30 seconds of joining a server or banned after only limited innocuous chat, it's likely that the person who banned you recognized you and doesn't want you on the server.
If you are banned for the reason "no," your directly previous action was most likely their reasoning. Since, for you, this was joining or saying "hi" this also supports the idea that the person who banned you didn't like you before you joined.
Basically, Wolfy doesn't like you. As a result you are not welcome on his server and likely any servers that he administrates. If you want the ban lifted, you're going to have to convince Wolfy that his opinion of you is wrong. Dramaing him is probably the worst thing you can do. Whoops.