A company I have no business relationship with sent me a breach notice stating that criminals got my data. This company is a supplier to many banks, brokerages, insurance companies, etc.

Obviously I want to know which of my banks or insurance companies I am doing business with trusted them with my data. I called and asked. They refused to tell me. But they have made it deliberately complicated. The phone number they gave to breach victims is for a 3rd party call center who knows nothing. So the call center says “we don’t have that info”.

Question: do financial/analytics orgs (or whatever the fuck they are) have a legal obligation to provide data breach victims with the SOURCE of the info? Do they have to tell me which of my banks (or whatever) hired them to be a custodian of my data?

What rights to data breach victims have?

(more background: https://links.hackliberty.org/post/2667522)

(update)
Thanks for all the useful feedback folks! I guess the question that remains is whether there are any federal laws that require the disclosure I am after. I looked up the law for my state here and found no law entitling breach victims to be informed of the source of their personal data. It would help to know the law because the AG, CFPB, and FTC will be limited to the law themselves.