The Consumer Rights Act 2015 generally applies in Cardiff, as it does across England and Wales. Goods should be of satisfactory quality, fit for purpose and as described, while services should be provided with reasonable care and skill. Depending on the circumstances and how soon you complain, you may be able to request a repair, replacement, price reduction or refund, but the outcome can depend on the facts. Keep your receipt and evidence, complain to the seller first, and check Citizens Advice or GOV.UK for guidance; complex disputes may justify advice from an SRA-regulated solicitor.