cannot acces my fantasy league acc

Hello people i have a big issue with fantasy lcs it does not allow me to play, i have been palying with my team mates for 5 weeks now, but now i wanted to log in and when i do it throws me back to the last season team and i have no access to my new team this season, my friedns sent me the link to the ne team but still i have no access to change things it says i'm like a guest here