“Alternative dispute resolution (ADR) means settling a complaint out of court with the assistance of an impartial dispute resolution body. Resolving consumer disputes this way is easier, faster and less expensive than going to court. […]”

Source: https://commission.europa.eu/live-work-travel-eu/consumer-rights-and-complaints/resolve-your-consumer-complaint/alternative-dispute-resolution-consumers_en

RAL Centers

In the event of a dispute, consumers may resort to an Alternative Dispute Resolution Entity for consumer disputes:

Center for Information, Mediation and Arbitration of Consumer Disputes in the Algarve (CIMAAL).
Phone: 289 823 135 (Call to the national landline network)
Email: apoio@consumidoronline.pt
Algarve Consumer Conflict Arbitration Center

More information at Consumer Portal