Received calls on unlisted numbers from this number with a recorded "debt" message

Again, "Reduce your debt" spam (left a voice message)...
No, I wouldn't dial 1 on my telephone...
Boy, would I like to know...
I don't have any debts!!!!
How did they get that WRONG information!!!
This is pure harrassement!!!

Called me on my cell. How can we stop that scum?

It's possible that this is just a stage 1 phishing attempt. They don't identify themselves, and you have the opportunity to hit 1. When you do that they then jot down in their database that you are a possible gullible target, someone to peddle products to. That in itself could actually be their actual product. The whole credit story could just be a story just to measure to see if you respond.
They're just profiling you.
Once you respond, you go into another database and you get sold off to a range of actual other marketing slime.

Do not call my home again .

Recorded message regarding debt management.  It evens leaves messages, uses up my air time.

Just go a call from this number at my office (Fed number in Ottawa). Recorded computer generated message. Just hung up.