I've been playing for 7 days now..

and the time have been expired.

When I try to login it says:

" Renew your account by obtaining C.R.E.D.D. from a friend or the official website "

Then I checked their homepage - and I can buy Credd for 17 EUR.

Can I then use those credd points to open my account again for 30 days? or do I have to buy the game first and then upgrade it

No, its just the default message it tells someone cause technically your time has expired.
What you actually need to do is apply a game serial code, its just the wrong message because Carbine fucked up

This post was edited by Mangix on Jun 12 2014 10:38am

okay thanks - do I keep my chars from the guest pass account when I upgrade the game to full game.

Yeah, like most games it just disables your ability to login to the account but the account itself stays the same in every way.

Thanks alot !