Mouldy Central AC in Apartment

Hello. I just found this board while researching ways of cleaning my AC unit and was hoping to get some tips or answers to my questions. Story: Over a year ago, we noticed that the parquet flooring near our ac unit was becoming discoloured. Upon further personal inspection, it was obvious that a leak from the AC unit was causing the damage. Management was notified and they sent an employee to inspect and repair the leak, and hired contractors to replace the flooring. Several months afterwards, the flooring began to deform and discolour again. Upon removal of our furniture from the area, there was black mould growing on the wall baseboard and much more severe discolouration of the flooring. After notifying management again, they sent another employee to 'clean' the area and replace the baseboard and flooring. The repairman removed everything, rubbed off the visible mould with a metal scraper, sprayed what he said was a 'mould cleaner' (when in actuality was just a sealant with no mould fighting properties, as I later confirmed on the internet) and replaced the baseboard and flooring.