Cash Crusaders Steeldale Non Regulatory Compliance and Dishonesty

So I bought a Samsung Galaxy J4 from Cash Crusaders in Steeldale JHB South. Once I tried to reset the phone to factory settings it required the original owners GMail account. When I took the phone back I wanted to know why it wasn't reset in the first place. Apparently the buyer who took in the phone was let go. They can't find the original owners detail due to a system problem. The owner who I insisted they contact was arrogant when I stated the obvious - this could be a ****** phone. I know they need to follow procedures and keep full records to prevent the sale of ****** goods. Let me be clear I can't state it was ****** as I will have to refer the matter further. But why are the previous owners detail not on file? Why was the phone not reset to start with? Surely they need to follow procedures to ensure this doesn't happen. Due to their utter lack of transparency and integrity I incurred additional expenses buying a cover for a phone I couldn't use. The management and owner were clear. This wasn't their problem.