I would say it was careless to leave such an item in the bike store without notifying the management or leaving a note and securing it. It's not unreasonable to be removed if it looked "dumped".
Sounds like you might not see it again and you'll have to learn from this mistake but I would ask management. If they claim they didn't remove it then maybe send notes to other residents and consider telling management that you'll be raising with the Police.
Sounds like you might not see it again and you'll have to learn from this mistake but I would ask management. If they claim they didn't remove it then maybe send notes to other residents and consider telling management that you'll be raising with the Police.