Oh — the joys of Strata Living.
You are to be commended for taking the personal approach and by acting so reasonably.
You shouldn’t assume that a certain type/level of noise is permitted (“legal”) because it occurs within certain timeframes; that’s incorrect!
Any advice that I might provide would depend upon whether you’re a Proprietor or a Tenant, but in general terms I’d strongly suggest that you read the information provided here. Even if you’re not in NSW, other States / Territories have very similar approaches to situations such as yours.