The issue of my being listed as a *****

I have send my complaint Last week… they tried to help me but still not will to help me to resolve the issue of my name being listed to the ***** service.. yet it is them who make name to be listened now they send this email to Me 👇

Good day

We have received a report of ***** where some of the monies were transferred to your account. You will need to provide credible proof of the source of funds for this amount which will be investigated. The listing with SAFPS will remain until proof is received and investigated for legitimacy.

Date: ***4

Reference: HHHG

Amount: 6,000.00

So my question wish Prove must I Provide now because I have send everything that they need on my side what more prove do they need

Please help