Hi,
It would help to know what field within support you require help with, but I've left a link to a generic Contact Us page with subpages which all lets you fill a ticket for contact.
Contact us
Jagex Support is also active on Twitter. If you check their profile description it has a list of every Jagex Community Helper from the Twitter volunteers support division.
https://twitter.com/jagexsupport
Life is like a camera: Just
focus
on what's important,
capture
the good times,
develop
from the negatives, and if things don't work out,
take another shot
!