illegal collection methods!!!! Be warned!!!

I own a rental unit where the tenant vacated the unit and the levy fell behind with one month. I was not informed of this by my managing agent nor the agent managing the complex. I just received a account from an attorney of which i was not ever phoned, or emailed by them to inform me of the problem. They sent a letter of demand to my tenant by the registered slip is made out to a company and not myself or my tenant. Obviously my tenant will not collect the letter of demand as it was not made out to any person that she knows. After pointing out the mistake to them they just refuse to except there mistake and now they charged me a heap off legal fees without me even knowing about the problem. I believe this was done on purpose to increase the account without me knowing about the matter. Other people should be warned about Biccari Bollo Mariano attorneys illegal collection methods. I am in the process of lodging a complaint against them with the law society to force them to comply with legal collections.