Kettle?

Customer Service / Contact Us
If you need to reach us, please email us on internet_correspondence(at)next.co.uk alternatively, you can call on 0333 777 8999# or fax us on 0116 284 6436 or write to us at:

Home Customer Services,
Desford Road,
Enderby,
Leicester.
LE19 4AT

https://www.next.co.uk/WinTC.asp

Returning faulty goods
If you receive faulty goods and wish to return them, The Distance Selling Regulations are in addition to your other legal rights.
So, if your goods are faulty and don’t do what they're supposed to, or don’t match the description given, you have the same consumer rights under the Sale of Goods Act as you have when buying face to face.
Any terms and conditions that say you must cover the cost of returning an item wouldn’t apply where the goods being returned are faulty.

http://www.which.co.uk/consumer-rights/regulation/sale-of-goods-act

I doubt you'll get a refund
January 2015