A New Lease Ends and I Get a New Apartment

The day after the old lease ended my boyfriend and I moved into a new one bedroom apartment. While unloading boxes from his truck we saw a man in a rusty beat up red toyota staring at us as we carried them to our building. The next night he sneakily made his way to our room carefully trying not to make any sound so whoever it was outside couldn't hear movement within the apartment. He went up to me and shook my leg a little bit whispering that there was some creepy old man outside our door just staring at it. We spoke with our front office and tried to explain what had happened but they said if it happened again to try to identify the person or talk to them