Or, if you don't want to fight this battle in lieu of other tenants, _threaten_ to sue to either force the agency to reveal the name and address of the landlord, or ideally, have them put pressure on the landlord to return the security deposit.
You research took time and their illegal withholding robbed you of your money’s time value.
More pointedly, the people involved would rationally pay well to avoid even the complaint making it into a public filing.
Did you ask a lawyer-- any lawyer-- before writing the sentence surrounding this word?
I assume the answer is yes. But I also think I remember reading a blog by you where you wasted hours attempting to reverse-engineer some hardware before finally sending it the help flag.