Dude, I would suggest talking to your landlord since the tenant obviously doesn't wanna compromise. Legal aspect wise, I would be inclined to think that these actions could be regarded as a form of nuisance in a form of interference with enjoyment of your property.Although I could be wrong. wiki Just read this for a general understanding of this.

Anyway, I'm not a qualified lawyer and its best to do your legal research 1st for this if you really wanna do a proper complain. All the best!