Guaranteed 30-day refund for faulty goods becomes law
New consumer laws have come into effect guaranteeing shoppers a full refund within 30 days of buying a faulty item.
Digital purchases such as downloads and apps are also legally protected, giving shoppers the right to a repair or replacement.
Another change makes it easier for consumers to challenge hidden fees and charges stopping companies from enforcing terms if they are deemed to be unfair - even if they are written in plain English.
The move is the biggest shake-up of consumer law in a generation.
UK shoppers spend £90 billion a month but figures from the Department for Business, Innovation and Skills (BIS) show they encountered more than 18 million problems in the 12 months to the middle of last year, leaving them £4.15 billion out of pocket.
BIS said the new act will make it easier for consumers to know their rights and shop with confidence.
Business minister Nick Boles said: "Whether it's downloading music or buying a fridge freezer, the Consumer Rights Act makes it easier to understand your rights.
"These changes will also simplify the law for businesses so they can spend less time worrying about unclear and unwieldy regulations."
Changes under the Consumer Rights Act 2015
The new consumer law also introduces:
Failed repairs - After a failed attempt by the retailer to repair or replace a faulty item, you are entitled to ask for a refund or price reduction.
A second repair or replacement - If you do not want a refund or price reduction, you can request another repair or replacement at no cost to you.
Refund deductions: No deduction can be made in the first six months after purchase. The only exception applies is motor vehicles, where a reasonable reduction can be made for the use you have had of the vehicle.
Disputes: Consumers have the option of taking their complaint through the Alternative Dispute Resolution process where it will settled by an independent abitrator