Your first call should be to a professional mold inspection and testing service, not the building management at this stage. While the landlord or building management is ultimately responsible for fixing the underlying issue, you need an independent assessment first to document the type and extent of the growth. In the UAE, a proper inspection involves moisture mapping and often air or surface sampling to identify the species, which determines the remediation protocol.

The issue is probably a combination of two things: insufficient insulation around the vent (allowing condensation) and potentially a clogged AC drain line causing excess humidity. A thorough service will diagnose both the building envelope issue and the AC system itself.

After a certified inspector provides a report, you can then engage your building management with concrete evidence to request repairs, such as improving insulation and having the AC unit serviced. For the mold cleanup itself, ensure the company uses containment procedures and HEPA filtration to prevent spores from spreading to other parts of the home during removal.