Report to police lor.
Then try finding around second-hand shops. Go further than
Admiralty. Go around Singapore if possible.
Lastly, if you ever buy a new bike again, engraved it. This will
help shorten the process of finding your bike and increase your
chances of finding your bike. Buy a better lock to secure it. The
best ones are the metal chain ones. If you feel unsecure about it,
park it near the MRT Station and walk towards the MRT Station.
Don't be lazy. For better security, put beside police station.
Nobody dares to steal it.