Q: When it's askin me to verify billin info and then input it it says ur session has been timed out

When I logg into my apple id it directs me to put billin info in. I put the info in and after I complete it says session timed out try again! Also I can't make any purchases or update without them askin me to verify my billin, and wen I input info it still either saying security invalid or session timed out