I-Book 12"

At last I bought the I-Book 12" on Wednesday, 26/10/2005. I do not have classes on Wednesday. Met up Tao Kei at Hatfield train station, and headed to Oxford Circus. I felt disappointed because the online price and walk-in price is not the same. Sent a mail to Apple, asking for the refund but no response from them. Stated behind the invoice, I can claim the refund if the price is changed within 14 days. Going London tomorrow, should I ask for a refund?