The Consumer Rights Act 2015 process usually starts by identifying whether the problem concerns goods, a service or digital content, and collecting receipts, messages, photographs and other evidence. Tell the trader promptly what is wrong and the remedy you are seeking; depending on the circumstances, this could include a repair, replacement, price reduction or rejection and refund. For faulty goods, the 30-day short-term right to reject may be relevant, while after that a repair or replacement is often considered first, subject to the Act’s conditions. If the trader does not resolve it, make a formal written complaint and check its alternative dispute resolution scheme. Citizens Advice, gov.uk or a solicitor regulated by the SRA can help with your specific situation.