Live webcast page dissapeared! I did pay but now I cannot log in anymore?? - 1288364

I just payed to join the live webcast for targeted therapies but since it hasn't started yet I closed the page in order to log in later, but now I cannot find the page to log in anymore. So I have a password but pissibility to enter anymore. I do not hope the only possibility is to pay again? Does anybody know where I can find the page to log in again to follow the seminar?