If you are having issues with your neighbours, you can hear your neighbours arguing or shouting, or they are playing loud music it may be worth you having a friendly word with them. They may not know that you can hear it.
If you're worried about approaching them, write a letter, explaining the problem clearly.
If the problem affects other neighbours, involve them as well. It can be easier to settle a dispute if the complaint comes from a number of people.
If the situation doesn't improve, we can arrange a meeting between you and your neighbour to try and reach an agreement to resolve the situation.