Unsolicited phone call

I received an unsolicited phone call from a Sigma on behalf of Debt Busters. They apparently received my information from a third party and could not tell me who. Yet they had my full names, cell number and almost sure my ID number. I want to know why Debt Busters think they are above the POPPI Act. Where they received my information from and who gave them permission to call me and use my personal information. My call was recorded by Elize and her supervisor Somea. When you call the number I received the call from, it says the number does not exist ***). I demand to know who they got my info from and how and also a copy of the recording. I have lodged a complaint with the Information Regulator.