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Legally, as a tenant all you can do is file a complaint to the landlord. If this is interfering with your use and enjoyment of the property, then you can inform the landlord as to all of the things that their use of the property is doing to interfere with your use of the property and that this is a breach of your lease and you need to give them at least 45 days to cure the breach, because they need time to get together and get a 30 day notice to evict sent to the tenant if they are going to evict. If they refuse to evict, then you would have to sue for breach of contract to terminate your lease and prove in court that this person's conduct interfered with your use and enjoyment of the premises (not safety, because under the law the landlord is not the insurer of the tenant's safety, all they guarantee by lease is peaceable use and possession of the property and that is what you have to prove is being interfered with).