The main place to get help is the official support/news subreddit, /r/olkb - the community is great at jumping in to help out others, and Jack comments on things when necessary. If you have a question specifically for Jack, there are weekly question threads where you can ask questions.
Please be patient! OLKB is a one-person operation, and I do nearly everything here. I'd prefer if you didn't ask, but if you must know, check out the weekly question thread, and post your order number for your current position in the shipping queue. Unfortunately that's all the information I can give about when things will go out - the schedule changes a lot from week to week, but I try to get most orders out by their 3 week (21 day) mark.
Changes to orders
If you'd like to add something to your order, please go ahead and checkout, then reply to the confirmation email with all of the order numbers you'd like merged - I'll process the refunds when things ship. If you'd to cancel, please email me directly with your order number, and I'll get things taken care of as soon as possible.