It's been many years since I worked on an SX50 so I'm looking at the quick reference card.
It said to cancel call forwarding dial any forwarding code and hang up.
Codes on the card: 444 clears all features
Call forward always= 56
Call forward no answer= 58
Call forward busy= 59
This next one I don't understand but it's on the reference card. When sets busy/no answer= 60
I would imagine that you will have to set call forward on no answer back to the voice mail system after cancelling the current call forward.
I hope this helps instead of confusing.
