Just for completeness, I've called CIC too and got the same reply. So I'd say it's safe not to call if you've already submitted the requested docs.Had you already submitted them but they didn't go through? Because I have submitted my PCC and Sched A and uploaded etc. and the message still reads 'Your Action is Required'. But like I mentioned before, I asked CIC about it and they said it was a glitch and that the docs had been received.
By the way, 30 mins wait time on a weekday afternoon. Are they becoming efficient?