I do not know what I need to do to demand a refund
I understood, you're unsure about the steps you need to take to demand a refund. Demanding a refund can vary depending on the specific circumstances and the company's policies. To help you navigate this process, I recommend reaching out to the customer support team of the company from which you made the purchase. They will be able to provide you with the necessary instructions and guide you through the refund request. If you have any specific details about the purchase or any other relevant information, please share it with the customer support team to ensure a smoother refund process. Remember, their primary goal is to assist you and ensure you have a satisfactory resolution.