FSI hiding behind POPIA rather than complying

I received a call from Charlene callng me on my personal mobile phone and stated that she is calling me on behalf of FSI (Financial Support Institute - as she said)

I asked Charlene no less than 4 times to confirm where she obtained my personal information. She advised me that POPIA restricts her from disclosing personal details and demanded that, that can only be disclosed in person.

I also asked Charlene to confirm FSI's FSP Number but she was unable or unwilling to do so