Bottom feeding collections agency specializing in old debt they cannot use any legal means to collect. Debt over 2 years.
Do not give them ANY information about you!! Nothing, do not say a word other than to ask for their mailing address and send a dispute/stop calling letter by registered mail. Only way to get rid of them.
Google "collections agency cease and deist letter ontario" cut, paste, insert bare minimum information and send registered mail. Calls will stop. If not and you have proof it was send, registered mail remember, report them to the Ontario Ministry of Consumer Services.