As above, get in touch with the council (environmental health/pollution control/noise)
Even if you are anyway, make a big effort to be polite and ‘act normal’ – offloading your stress on the EH officer will not help your cause.
The council will send a letter to your neighbours describing the problem and the consequences if allowed to continue. This usually suffices but if not you will be asked to keep a diary of the nuisance which will then be used as evidence in court.
Note that this procedure only tends to work with normal law-abiding folk if they are nutters next door it will be like water off a duck’s back.
Good luck.