Well FWIW my payment ended up in 'unclaimed money' as I had moved address around 5 times since the last known address according to the search.
You can check out unclaimed money at
https://www.moneysmart.gov.au/tools-and-resources/find-unclaimed-money
https://www.moneysmart.gov.au/tools...money/claim-money-from-shares-and-investments
& for a small fee Delisted will do the hard yards (have not checked the fee as yet)
http://www.delisted.com.au/company/amex-resources-limited