Good advice, took the advice and googled 888-698-7967, turns out it was a collection agency, Transworld. Called them, spoke to an agent right away without waiting on hold.
Me: Hello, I just received a call from you
Agent: What is your name?
Me: George XXXX
Agent: Are you calling from 416XXXXX?
Me: Yes
Agent: That is odd. Your name is not in our system. I will take your number off and you won't get any more calls. It might take up to 24 hours for this to happen
Me: Thank you
That was painless, almost too painless. I will believe it when the calls stop.
I have lots of experience with collection calls, but not because I had debts. About twenty five years ago I let my good friend Clayton stay in my house. He was a very decent person but made poor choices and ended up homeless and living in a Toronto shelter. My land line became his number and of course, he never paid his bills. The collection calls started coming in. Clayton stayed with me for fifteen years and eventually passed away from throat cancer caused by heavy smoking. The calls did not stop till a full year after his passing.