If you're contacting him about something stupid like I once did, he will just ignore it. But usually if you're asking why you were banned or something like that, then he'll reply.
Well, asking about unbanning your account would be something the staff, should they be at work, would ignore, unless you have clear evidence that a moderator might be abusing their power, rather than "My brother used my account, so it wasn't me" or "I was talking in my sleep" and what not.
Either way, the staff might very well have been on holiday since the 22. of December, and might not be back before later this week, so please have patience.