It is useless for the Hyflux investors to protest.

https://sg.finance.yahoo.com/news/rare-singapore-protest-flags-investor-anger-hyflux-slump-025643570.html

There is no point in protesting because the Hyflux investors won't achieve anything. Just look at and learn from the history of Lehman Brothers' minibonds sold by DBS.  DBS also refused to compensate the Singapore minibond's investors until the HKMA forced DBS's subsidiary in HK to compensate the HK investors.  It was the HKMA's action that compelled DBS to compensate our Singapore investors.

The Hyflux investors have to bite the bullets and move on because there is nothing they can do.