I've stayed out of this one, as I didn't hear the programme or the context in which the remarks were made.
As it took the media a week to pick up on this I'm inclined to think that there's a sub-text going on here.
That aside I am surprised that as this was pre-recorded it was allowed to be broadcast unedited, but that of course would have probably meant having to admit it was not a live show, as many listeners thought it was, which may account for the initial two complaints only, which I believe was about the swearing, not the stupid phone calls.
I am not a fan of either of these two gentlemen and my idea of purgatory would be having to listen to these two on a Saturday afternoon, but there are more people than these two involved, a whole production team, surely someone knew that their behaviour was unacceptable, for broadcast at least, but apparently not.