[2020] everytime i try to log in it shows this. ive tried a bunch of stuff but nothing works. also im currently a ftp player so i dont know why i need to visit billing system

Hey! I think this might have something to do with an unsettled balance on your account. The majority of the time it's hijacker-incurred or something.

https://support.runescape.com/hc/en-gb/articles/207256855-Settle-an-Unpaid-Balance

The bottom of this page has a Contact Us button to allow you to talk to the Payment Support team - they'll fix it for you.

Drop a support ticket through the link I sent you - they'll be able to help you!