Nudgingsteel.
If they were on a divert anyway and as I presume there were no other options otherwise they would of taken them.
In my book thats worthy of a Pan call then if they tell you to contact handlers its "Pan G-xxxx negative due pilot workload" If you still don't get any joy upgrade to a Mayday and sort it out on the ground.
I suspect you would be doing the controller a favour, as soon as you declare they can tell the airport authorties to butt out and let them do their job.