Another discussion drifting from the original point, but looking at the sale of goods act on this site should clear things up.
http://sogahub.tradingstandards.gov.uk/sogaexplained
This is an extract:-
Customers are entitled to reject goods if they are faulty (do not match the description , are not of satisfactory quality , or are not fit for purpose ) and receive a full refund if they have not yet accepted the goods.
Before a customer is believed to have accepted the goods they have purchased, the law allows customers a reasonable opportunity to inspect or examine the goods and this should take place within a reasonable time .
........ Snip ........
For items being delivered, it is important for retailers to know that signing a delivery note is not acceptance as it does not allow the customer a reasonable opportunity to inspect the goods and identify any problems or faults.
The law does not give a time limit for acceptance. When trying to decide if a customer has had a reasonable opportunity to inspect their goods, consider what an impartial person in a court would think reasonable for that product in the circumstances.
,,,,,,, snip ......
Faulty goods, no acceptance
If the item does not conform to contract (is faulty ) for any of the reasons mentioned previously, and the customer has not accepted the goods, the law says the customer is entitled to reject the goods and claim a full refund, or request a repair or replacement if that is the customer's preferred option.
As the retailer, you can offer a repair, a replacement or a credit note, but you cannot insist on any one of these. It is the customer's right to receive a full refund in these circumstances.
Hope this helps get back on topic.