RE:My shares became non-registered - What should I do?This may help a bit.
Qualifications for resp and tfsa versus sdrsp may be different.
My Minera irl.to shares in my sdrsp (with a major bank discount broker) now shows as on grey sheets as sym MRLLY..
No notes on holdings page and no emails to state otherwise.
So in my case it may feasible that I am on a valid exchange and still qualifies to stay as 'registered'.
Your proposed call to CRA may help as a start.
A