As detailed here
http://forums.spiralknights.com/en/node/67036
I had to wait quite a while for my paypal payment to clear. While waiting I made a number of purchases with Boku (more than I thought it seems)

I attempted to make purchase of a battle pack and was told that I had reached my limit.

My question is: how long does it take to review a case if I e-mail and request it be raised?

edit
I've actually decided that I've spent too much on the game already and will live within the limit - but will leave this question in the event someone else has the same question.