Written with people moving from Turkey in mind. The Portuguese rules still apply more broadly.
Free Legal Help: Arbitration Centers
If you have a dispute with a utility provider, bank, or insurance company, you don't need a lawyer immediately. You can appeal to a "Centro de Arbitragem de Conflitos de Consumo".
These centers offer mediation and binding decisions for free or a nominal fee. They are specialized by sector (e.g., Energy, Insurance, Auto) and are much faster than the court system for resolving consumer complaints.