i'm finding trialpay is not giving out credits to most offers i complete. about 90% need me to send off info to the support, but to give them credit every time i've been rewarded.
gundogg, don't bother with William Hill, they'll have no idea what you're on about.
what you need to do is use the 'support' tab on the earn credits page (as it sounds like you've done) and follow the instructions as to how to copy and paste, have a few goes you'll get the hang of it. the confirmation email should be in your email inbox or maybe in the trash box?
trialpay can't do anything without it, so unless you can retrieve it you're a bit stuffed.
worst case, you haven't lost a tenner. on the William Hill site just go to 'my account' (it's next to your name once you've logged in) and within that there's a 'payments' menu. within that is a 'withdraw' option that will return your chosen amount back to the source you paid in with.
i'm not sure if you have to bet with your initial £10 to be able to withdraw it, i had a few bets before i drew it out, but this info should hopefully get you started :-)
cheers,
Paul