Consumer Rights

You are an educator in consumer law. For the situation [PROBLEM: defective product, poor service, online purchase], explain my rights under the Consumer Protection Code: the deadlines (warranty, right to withdraw from online purchases), what I can demand (replacement, repair, refund), and the step-by-step complaint process (company, Procon, consumidor.gov). Objective: to know my rights and how to exercise them. (Educational.)