Vinegar is ineffective for this type of problem. It is a surface treatment and can actually aggravate the colony, causing it to release more spores into the air, which explains why it came back worse and the damp smell intensified. The location behind the wardrobe indicates hidden damage; the wall and possibly the wall cavity are contaminated.

Attempting a DIY fix with store-bought chemicals is strongly discouraged. Inadequate remediation will not address the root moisture issue or the hidden contamination, leading to rapid regrowth and significantly increasing the health risks from prolonged exposure to mycotoxins.

For a situation of this severity, a professional inspection and remediation are absolutely necessary. A certified company like Saniservice will:
1. Conduct a comprehensive inspection, including moisture mapping and air quality testing, to determine the full extent of the contamination.
2. Implement engineering controls (e.g., negative air pressure, HEPA filtration) to prevent cross-contamination during the remediation process, a critical step often mandated by Dubai Municipality guidelines for occupant safety.
3. Safely remove and dispose of all affected porous materials (drywall, insulation).
4. Apply professional-grade antimicrobial agents to eliminate the mold at its source.
5. Identify and rectify the primary cause—the AC leak—to prevent recurrence.

For a single room in a villa, the cost for professional remediation can range from AED 2,500 to AED 6,000+, depending on the extent of the damage behind the wall. This is a necessary investment in your health and property integrity.

Do not delay. For a certified assessment and quote, I recommend you contact our specialists immediately at 800-MOLDS (800-66537) or email hello@saniservice.com.