Can I sue a company for selling counterfeit or fake products?

Yes, selling a counterfeit product while representing it as genuine amounts to both an unfair trade practice under consumer law (giving you grounds for a consumer complaint seeking refund and compensation) and potentially trademark infringement or a criminal offence, depending on the specific circumstances and who was involved in the sale.

As a consumer, your most direct and accessible route is typically a complaint before the Consumer Commission, seeking a refund, compensation for the deception, and, where the platform facilitated the sale, potentially naming the e-commerce platform as well.

Keep your purchase receipt, product photos, and any comparison with genuine product details (such as differences in packaging, quality, or serial numbers) as supporting evidence. If you suspect this is part of a larger, organised counterfeiting operation rather than an isolated incident, it may also be worth reporting it to relevant authorities or the genuine brand owner, who often have their own enforcement teams for such matters.