I'm not always on the forum, its not an "official" support channel, but I do try and keep an eye out and respond when I can help. More often that not the fantastic community here provides great support to other Zen users incredibly quickly.
I have reached out to anyone that I've come across commenting that they've not had a reply. Unless they've indicated they've already had their query resolved.
We aim to respond to emails quickly, but we're even quicker on the phone. We get a lot of emails, from time to time its not possible to respond to them all as quickly as we'd like and I'm sorry about that. But I can assure you we try to get back to everyone quickly.
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Andrew
ZeN Internet