Understand the issue but not sure if this is really the forum for this type of matter. I would recommend speaking with owner or taking formal action in writing by contacting him with your concerns, his/her promises, etc. and let him/her know you (and hopefully other neighbors who are willing to sign their name to the letter) are going to be pursuing further action with the city if he/she doesn't respond. I know of other neighbors who have addressed matters in a similar way with quite a bit of success.