Make sure that you are logged in using your surrey account. Click the "Join Today" button once. If successful, you should see a pop-up with confirmation saying: "you have paid for membership..." Membership is free so do not worry. Close the confirmation window.
If no pop-up with confirmation is shown, refresh the page, make sure that you are logged in and try again(once). If not still successful, Please contact us via our email(firstname.lastname@example.org).