So I went to the clothes counter and he said I could go to the customer service counter and give it a go where they may refund me from the Club Card but it will take time or he was willing to exchange.
I spend ages looking and thought I had found what I needed. Then when I got to the till I discovered they were the same fucking colour.
Ended up getting two school shirts (needed) and some Harry Potter pants (not needed) and having to shell over a further £2!