item no longer available

yesterday I went to Edgars to buy Ben10 towel /bag combo. When I wanted to pay I was told that the item cannot be sold as it is not on the system. I asked if I can get it anywhere else she said it means all Edgars are no longer selling. I asked how come the items are still in the shop but cannot be sold and I was told \ I don't know as I am working at the tills and there is nothing I can do". I was so disappointed because my son really wants that bag so badly. I wasted my time on the queue to pay and to be told it is off system. My advice is that if it cannot be sold for any reason please remove it."""