Tried to get the responsible person for my apartme...

Tried to get the responsible person for my apartment, but she has never returned. It's now more than a half year ago and despite the fact that I have e-mailed several times, left a message on the answering machine and via the switch (they said she is available) she has not returned. I have questions that I can not answer. So unhappy. So bad and boring that they are stunned in their tenants.