Originally Posted by WiredGuy

From a legal point of view, it seems your stuck paying the bill because you missed the deadline to inform them of cancelling the server. You can try claiming you sent notice earlier and they didn't get it but that'll be hard to prove. At this point, you unfortunately need to contact a corporate attorney and based on his/her advice a litigation attorney. It seems Jupiter is throwing everything at collecting and its time to step up your defence. Don't wait until you are served, get an attorney's opinion asap. Have your attorney contact them for a settlement. You'd be surprised that it wouldn't cost that much if you do a settlement, probably $1k in legal fees plus the settlement amount.
WG