How to turn off XP gain at lvl 19?

[Hudders]

I know in retail this can be done by visiting main city and paying Behsten or Slahtz10g. How is this done on Lordaeron server as I could not find this character? Thanks.

[Shred]

You have to look closer since they definitely are there.

[Hudders]

Found him hiding in the corner, almost invisible. Thanks for your help.