Gitbooks has terrible support and product is buggy alternatives?

I've decided to use Gitbooks for a project, but I have constant Github sync issues. I've been ignored by support for 1 week. Every time I manage to get in contact with somebody they keep repeating that "well you initiated contact during the weekend so that's why our response time is long". They seem to forget today is thursday, which is well into the week...

Anyway, I need to absolutely find an alternative as I don't see any reason to use this garbage.

Is there anything out there that is a WORKING Gitbook essentially?