If you discover a defect in a product you purchased in Kuwait, Article 14 of the Consumer Protection Law (Law No. 39 of 2014) gives you the right to choose between three remedies: a full refund, a replacement, or a free repair. The supplier is obligated to fulfill whichever option you select, within the timeframe specified by the law or its executive regulations. You do not have to accept a repair if you would prefer a refund or exchange.
Additionally, under Article 16, the supplier themselves is legally required to notify the National Consumer Protection Committee within seven days of discovering or learning about a defect in their product. If the defect poses a risk to consumer health or safety, they must also alert the public. This means the obligation is on the business, not just on you as the consumer.
To protect yourself, always obtain a written Arabic-language invoice as required by Article 15, as this is your key proof of purchase. If a supplier refuses to repair, replace, or refund a clearly defective item, you have the right to file a formal complaint with the Ministry of Commerce and Industry's Consumer Protection Committee.
This is general legal information, not legal advice. For advice on your specific situation, consult a lawyer licensed in Kuwait.