Debt collection scam run by Commercial Credit Adjusters (CCA) Limited based in Winnipeg, Manitoba, Canada that have telemarketing/scam centres in various Canadian provinces. They are either trying to collect ficticous debts or the debts of a third party that have nothing to do with you. CCA leaves vague messages to get you to call them back at their real phone numbers of 1-866-958-5850 or 1-204-958-5850, but they call from a variety of different phone numbers to hide their identity -- possibly using caller ID spoofing.
According to the CRTC: Telemarketers who make calls to Canadians are required to accurately identify themselves and their client. Telemarketers who use technology to spoof their Caller ID information with inaccurate, false or misleading information violate this requirement. Each violation of the Unsolicited Telemarketing Rules can lead to fines up to $1,500 per violation for an individual and $15,000 per violation for a corporation.
If you suspect fraud, you can report it to your local police or the Canadian Anti-Fraud Centre (1-888-495-8501), a national service jointly operated by the Royal Canadian Mounted Police, the Ontario Provincial Police and the Competition Bureau.