I'm starting to suspect that it's the delivery companies that are in on this. I just got a new home phone number - and the ONLY company that has my new number is Muscle & Strength, and presumably DHL (who is shipping my order).
Other commentors: please list which delivery company you are using. Maybe we can start seeing patterns which companies could be selling our info (possibly an employee in the company who is secretly selling this info to African scammers and getting a cut).
That would be the only logical explanation why we are all getting these calls while expecting an overseas package.
Caller: Canadian Delivery Express