Honestly, there's not really much you can do in this situation. I know it sucks, I can't stand dealing with neighbors. You can either contact the property manager/management company and hope they take care of the situation, or you can move. Unfortunately, property managers only handle complaints and issues at their discretion and when it is convenient for them. Also, never assume your neighbors have the same lease as you. Some could be on older leases, etc. Either way, there is legally nothing you can do about it. Your lease is there to protect you and the property manager from each other, but moreso the property manager.

I used to work in property management. These kinds of things just come with poor management of a multi unit complex.