Tells caller to call back with caller identification unblocked. ALso said my phone doesn’t accept calls from unknown callers.
> my phone doesn’t accept calls from unknown callers.
Login to My Shaw, select "telephone", and disable that feature on your phone-line.
QED
If the caller is a subscriber to Shaw Phone service, the caller must dial <star><six><seven> to "unblock" their phone, for the next call -- obviously to you.