Unfortunately Douglas Elliman was hired to manage ...

Unfortunately Douglas Elliman was hired to manage my coop in NYC. DE has now failed to repay an inadvertent over-payment of my monthly maintenance ($10,000.00 ! ) for ten (10) weeks, since my request for refund. To this day, still not refunded.
I second William from Brooklyn, who complained about DE losing checks.
DE claimed to have sent me a check, which I never received. Weeks later I received a check which bounced, because DE had stopped payment !
I finally directed DE to return my money by wire transfer to my account, inasmuch as DE's checks mysteriously go astray but, to date, I get no response from DE.