Virwox.com Level 4 ?

[OmegaStarScream]

Hi guys , I know that Virwox.com level 4 is on-request only but I want to know (If someone already did it) how to proceed ? do you need to contact them and tell them that you want to upgrade your account ? Is there is any minimum amount of transactions you should  do before they upgrade you ? or once you are level 3 , they could upgrade you with no questions asked ?