For headstart. Refer below.
12. Can the operators and members of the public seek the
Government's advice on the legality of their business
schemes?
It is not proper, nor appropriate, for Government agencies to give
legal advice on which scheme is legal and which is not, as this
would circumscribe the Government's effectiveness in enforcing
regulation against fraudulent schemes that may evolve over
time.
Instead, the operators and members of the public should acquaint themselves
with the relevant laws, and seek legal advice from lawyers, where
necessary. Lawyers should be able to advise on
specific cases, according to the context and how the actual events
unfold.
source:
http://app.mti.gov.sg/default.asp?id=567
Maybe you can try out with DSAS or CASE.

Case chief Seah Seng Choon said that year to date, Case has
received 128 instances of feedback and enquiries on MLMs, compared
with 68 last year and 36 in 2007. Most instances relate to
companies' failure to honour the terms of agreements or verbal
promises. 'There is a thin line between MLM on one hand and pyramid
selling on the other,' said Mr Seah.
source:
http://www.asiaone.com/Business/My+Money/Starting+Out/Investments+And+Savings/Story/A1Story20090406-133576.html