Icebox3d was fixing a lot of plugins last night and asked for your co-operation to not do anything that involved certain plugins. 
When he was fixing Mcmmo, all of your stats reset to 0.  And the same for when he was fixing the Iconomy plugin, you were set to 5nz. 
I had plentiful questions as to getting money and stats returned and yes I am sure that Joe is going to fix it.  In the mean time please do not harass any of the staff about refunds as there's not much we can do. 
Also, do not try to lie about your money and stats as Joe has it all saved somewhere so he will know how much you had and what your stats were.

I would advise you to take a stroll outside for awhile until the server is up...if you wish to do that

It seems now that the server is up, but is under an maintenance (White-list Limitations).