The products listed are not available at the price advertised

i went to iceland today to buy Velvet toilet roll(the eqivalent of 24 rolls worth) supposedly at £3.00. They were £8.50. So that was a waste of time. I also went to B&M bargains for 50p tomato and basil Heinz soup. They didn't stock it. The cheapest Heinz soup was £1.35. This is in Leicester. The scheme does not work.