Back in 2015 there was a consolidation of STI shares - for every 2000 shares held you ended up with one share (2000- 1). So if you still held 500000 shares at that time you now only have 250 shares.
Also back in 2015 the administrators handed to operation of STI back to the Directors, Peter Boonen resigned and was replaced by Peter Torney.
I suggest you go into the ASX site and read the announcements put out by STI during 2015
STI Price at posting:
0.2¢ Sentiment: Hold Disclosure: Held