On Friday, January 25, 2013 10:13:20 PM UTC, Rick Hughes wrote:

I did try this, they just replied they met their legal obligations by

issuing a credit note with T&Cs printed on it.

Aye; but the T&Cs have to be made known to you before you agree to the contract/accepting a credit note. Handing you the T&Cs on the credit note is a fail; the contract has already been made.

Did they tell you of the T&Cs before? If not, then they don't apply. Amateurs.