My demo submission

I submitted a rap/ hip hop demo a few months ago to your LA Latium entertainment agency in an effort to be picked up by the Mr. 305 or similar label. I was told it would take anywhere from 30-90 days to hear something back, either positive or negative. It has been just over 5 months now., with nothing. When I call I get no info. I know I may be jumping a few steps here, but I am trying to figure this industry business out on my own with the help of Google & what little published literature there is on the matter. So Mr. Worldwide or anyone reading this whom is familiar with the music industry, I would really appreciate any input on a better address, how to get a legitimate response, advice, etc.Thanks!!!