Under the terms of article 18 of Law no. 144/2015, of 8 September:

Please be informed that, in the event of a dispute or dissatisfaction with the service or product provided, the consumer may resort to the Porto Consumer and Arbitration Information Center, Rua Damião de Góis, 31 - Loja 6, 4050-225 Porto, Tel: 225 508 349, Email: cicap@mail.telepac.pt