Actually all our products are non-returnable if they are unpacked after arrives. This is for hygienic reasons since we cannot ensure the sterility of items after they have been received and opened. That should be a relief — you can rest assured that no product you receive has ever been in the hands of another customer! If the products are still packed, please follow the steps from How can I change the product quantities/product colors/cable types For any problem, please contact our dedicated customer service: support@svakom.com