I hate having to ask my wife to get me out of things when I get out of my depth
The legal position in UK law is
The Sale of Goods Act 1979 states that if an item isn’t fit for the purpose for which it was intended, you can return it for a replacement, refund or repair – the option is yours.
It doesn’t matter whether you purchased it in the High Street or on the Internet, you still have the same rights (just as you would if you’d bought it over the phone or by email).
A guarantee doesn’t really enter into the equation here at all either, as you’re covered under the Sale of Goods Act.
Because it was damaged in transit, the retailer is responsible for supplying you with either another item, or you could reasonably ask for a refund or replacement. However, it’s fair for them to ask you to return the item before doing anything in order to examine the damage that happened and be sure it actually exists. That’s no reflection on your honesty, just simple and sensible business practice.
On matter in question she points out most courier companies have in the small print you are signing to say you received the items in satisfactory condition. Items should be unwrapped and checked before signing, not very practical I know but thats the terms and conditions of carriage.
The retailer is within his rights to ask you to return your goods at your expense but most reputable sellers will then refund this.
If you have not complied with the 2 points above then your chances of legal redress are slim.
Her opinions not mine and although I hate to admit it she knows a lot more than I do on this subject