I find those internal messaging systems are often unreliable.
The software provider includes them with the system but they aren't always monitored or even working.
Have you delivered any players? The unfortunate reality is that there are often only one or two staff dealing with a huge volume of affiliates - it's physically impossible for them to respond to every email so they have to prioritize affiliates who are sending players.
I have a contact there - if you PM me your email address I can pass it on but obviously can't promise anything.
Interested in quality, relevant link exchanges and deals, especially with UK sites.