I was finally fed up with scam phone calls so I went into my home phone account and turned on spam call blocking. I received calls as expected until my neighbour e-mailed asking why he couldn't call me.
After asking him about it he was being dumped to voicemail with no opportunity but to leave a message. The system had identified him as a scam caller and that was the expected action.
I opened a chat with Rogers/Shaw tech support and explained the issue. There were long pauses between answers and the support person told me that she was dealing with 2 of us at the same time.