The Consumer Rights Act 2015 applies in London as it does across the UK, covering many goods, services and digital content bought from businesses. Goods should be of satisfactory quality, fit for purpose and as described, while services should be carried out with reasonable care and skill. Depending on the circumstances, you may be able to request a repair, replacement, repeat performance or price reduction, although the appropriate remedy depends on the facts. Keep your receipt and contact the trader first; Citizens Advice or a solicitor regulated by the SRA can explain your options if the dispute continues.