You seem to be posting here because you went to a FaceBook page, promising you free gp for posting, and that had a link claiming to be to the RS Forums but actually leads to a phishing site. Those people are not really giving away gp. They are trying to steal your account details.
Do not follow links that you have been given by others to access the RuneScape site. Instead type the address yourself, or use browser bookmarks that you have set yourself.
If someone is pressuring and/or bribing you to visit any website, even a YouTube or Facebook page, it's best to report them for advertising a website and then add them to your ignore list. If it sounds too good to be true, it probably is.
I encourage you to follow the security advice offered in the
Account Security Advice
, provided in the Support Centre, to make sure that your computer and account are secure.
Additional advice to prevent and report Phishing can be found in the
Phishing
article.