I am just another victim with more than 190,000 siacoins stuck. Block explore clearly shows my deposit has gone through but still 0 credit in my account.
http://explore.sia.tech/hashes/95437558571b645df4d2b23876bdd1032b34545dc1368ea1f89fa14dbdb76e5cSiacoin Transaction Summary
SUMMARY OF TRANSACTION ID
Height 138643
Confirmations 34
Output Reference(s)
e72901972e8f51863fd147f4d73d5111cf9fa5a8d3941ad2c28300f5d4ca0451
Transaction Value 192,367.18 SC
Clearly a Ponzi scheme, they are using my coins to fulfill others' withdrawals. When I need to withdraw, they will need to wait for others' deposits.
Do you even know what a ponzi scheme means? You should be more patient and wait for the deposit to appear in your account. Having that said, try to find out how many confirmations Poloniex requires for Siacoin before making stupid accusation threads.
3rd day, still nothing.
Then contact support or make a tweet on their Twitter account.