@StijnHelwegen_NL Hi, welcome.
First thing you need to keep in mind that those offers are completely free, there for it can take sometimes more then a week before you receive them.
If you don't receive them after 7 days waiting period then you can do two things.
you sent a email to EN.email@example.com and don't forget to mention the advertisers names in the email.
you can go to the dutch community's forum and report it in the special topic for free offers that they have there.
If you want to so the dutch community's forum, then please logout from forum and log back in again.