Everything depends on at what stage you cancelled the IVA. If it was before the creditors meeting then no action would have been taken by the IVA company, if it was after the meeting and you had signed the proposal then I am surprised that the IP has not contacted you. You need to supply a bit more information so a better explanation can be described to you.
Last Payment made 04/12/14. Completion Certificate 25/7/15. IVA company GT. No Issues
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk