The North Face gift isn't worth the card it’s written on

My relative thought I could spend it in numerous London stores but there’s just twoLast August I was given a £100 gift card from The North Face by a relative who had bought it in the Leicester store. I live in London. She saw there were many stores on its website in London, and that it was also valid online.I finally got round to using it in January, and went into its store near Charing Cross. But I was told that because it was a franchise, or authorised seller and not a full store,