Yes, pull install pipes outside. I don't care about the beauty of appearance anymore, the key is I can reach the pipes and work on it if there's any problems in future (even I can pull for extended pipe from it if needed then). I even don't want to cover it with casing...hahaha ... Ugly?!
Just keep complaining, if you got find a few more neighbors feedback to management is better! My place's car park also having such issue, management solved it immediately with 3 injections! Maybe that's a "warranty" from the contractor whom just renovated the swimming pool?!

Go management office every 2 weeks. Ask them for progress.

That's why I wouldn't apply the Hack & Replace method. Just right away pull from the main supply (reached my toilet ceiling, exposed), then connect from there and Piping to all around the toilet like toilet bowl!

In this case, without hacking, how much will be cost?