The controller would be a better bet to begin with. Something like: "Hello, I've got problems, yea, call it a pan if it helps, request climb... blah"
so.. you would say that while in sight of the surface and on approach into a waether diversion alternate, it would be prefereable to climb into cloud, loose sight of the surface and visual reference into strictly controlled, high density airspace.. to do what exactly.. hang around for a few days till the weatehr clears ?
Or you could to take it up with St Peter
and airframe icing will certainly ensure that.
if opening your gob and asking for help is too scary.
and he was recieving help. funnily enough, controllers don't have a 'magic hand button' to pluck an aircraft out of the sky and place it neatly in a desired location.