[gizmo]

Isn't it easier to go to > General settings> Contact us form options>
And unchecking fields you dont require?

For instance my contact us for just has Name/E-mail Message Just basics!
Department you can edit through > Lanquages just search label > Department, then edit that if you want to change name.

Then to edit which department do a search text label or text> for each predone department, then edit to your choosen department
Alan