Floor Tile Repairs

Some of our floor tiles popped and cracked.
When I removed the tiles I found several large cracks in the concrete floor.
I have progressively lifted approximately 90 tiles, most of which I was able to lift unbroken by using a large screw driver and a hand tool for grout removal.
I need to remove more that are stuck firm, this will require use of a crow bar and considerable noise.
Also, to remove the tile cement bedding and grout requires scraping with a crow bar or floor scraper which also creates considerable noise.

I was told by my neighbour that he was verbally abused by the owner below him for making noise, which was probably noise that I was making when scraping my floor.
I have stopped the work until I can work out how to proceed without affecting my neighbours.

Our By Law regarding noise states:
“The owner and occupier of a lot must not create noise likely to interfere with the peaceful enjoyment of a person lawfully on another lot or the Common Property.”

Quite simple really, but how do I repair my tiled floor without breeching this by law?

The only way I can determine is to hire a contractor with a pneumatic jack hammer and a concrete grinder, as not being an owner or occupier he is not subject to the by law.

Also, it appears to me that the tiles popped and broke because of the cracked floor slab.
The floor slab is common property but the tiles are mine.

Who should pay for repair of the broken floor tiles?

Regards,
Ken