You are an adult, go to the tourist police and file a complaint, saying that you may get no result and LB will be still living there and will know you went to the police.
As many expats on here have already said, move, the easy option and you will have a better quality of life. It is interesting the Condo management have not done anything, maybe move into a better condo that has a good track record of management, go for the big names in the industry.