Just ignore him. Eventually he will get tired of walking abnormally and stop doing it.

If you keep reporting him he will keep doing it to annoy you and he knows you can't do anything about it.

If the noises are from your neighbours going about their normal lives like walking, flushing toilet and opening/closing door and kids playing it is pointless to complain. Firstly, your complaints will get nowhere. Secondly, you make them angry and they will escalate the sounds to annoy you. Blame the developers instead for cheap construction.

However if the noises are from playing loud music and partying late at night, then you can complain and get some action taken.