Case of a Delivery Failure and Refund Issue. Journal of Informatics Education and Research, [S. l.], v. 5, n. 1, 2025. DOI: 10.52783/jier.v5i1.2265. Disponível em: https://jier.org/index.php/journal/article/view/2265. Acesso em: 14 apr. 2026.