Under the Consumer Rights Act 2015, goods must be of satisfactory quality, fit for purpose and as described. If they are faulty, you can usually reject them for a full refund within 30 days of receiving them, although specific rules apply to some goods and situations. After 30 days, the retailer will generally have the opportunity to repair or replace the item; if that is unsuccessful, you may be able to reject it or seek a price reduction. Contact the retailer, not just the manufacturer, and keep your receipt and evidence of the fault; for a complex dispute, consider advice from a consumer organisation or a solicitor regulated by the SRA.