How do I dispute a wrong or excessive service charge in Dubai?

First, write to your management company or owners' association citing the RERA-approved budget and the specific line items you question. If unresolved, file a formal complaint with RERA via the Dubai REST app, Mollak, or the Real Estate Violation System, typically with a fee around AED 500. RERA reviews the accounts and can order refunds, reductions or penalties. Keep paying meanwhile.