Was the account new? If it was that's way to much to bring in on a new account!
If you provide all the info they are asking then you should be able to lift the limit. If not you will have to wait 180 days to get your money. Since you haven't shipped the items yet, you might want to think about refunding the buyers.
Yup. You made too much in the first few days. I too am going through the same thing. Except I'm not "legit" well I am but doing it under my moms name and she's legit. Just send in everything, call, call, and call. Wait a few days for the packages to be delivered and hopefully you can this thing lifted if not which is also possible, be prepared to wait 180 days for your money.