Managing Agent refuses to arrange access to a property or answer any calls

They don't respond to emails or voice messages. When you phone the staff actually refuse to answer your call, this I know because Ina carried her phone to Lillian's office and I heard them talking and Ina transferred my call which was simply sent to voicemail although Lillian was in the office and not on the phone. They refuse to provide the contact number for the principal of the agency but do give you an email address. If they don't respond to emails sent to their main inbox why do they expect me to believe that their MD / Principal will be any more responsive.