Best answer by Angelabikerbabe
A switch normally takes up to 6 weeks to complete, as all the details have to go through a 3rd party verifier.
Once the switch has completed, PP will issue your final bill and if you're in credit, they will refund you. (Or if you owe them, they'll take a final payment)
Don't cancel your DD, because they won't be able to refund you then.