They will pay you, never in doubt.
Give them a call, if you want I can PM you a phone number, and you can speak to any given affiliate manager there. They will be glad to help.
I also had a question lately and called them up 2 days ago and ended up chatting with the guy for 30mins about all kinds of things like promotions, the various products… this and that.
They are there to help, maybe a little overwhelmed at times but they WILL help you solve your problem.
We promote them in the deepest realms of our sites and not on any prominent spots but despite that I personally feel they are a good program (one problem – but that is true for all UK bookies/brands – affiliate managers change very very regularly – you build up a relationship and booom, they are gone)