Asda price guarantee, what a joke! Since I started using the self check out most of the things on offer when I scan the items are different to the shelf price therefore no offer. I called them over time after time and they make me wait to check the price to see if I'm lying and they always return and apologise. One of the staff members laughed and said "I wonder how many other people we have ripped off today!" This happened to me again today with Item showing offer of £1 and when I got to the till , it was £1.50! I just told them, to put them back as i'm sick of asda ripping me off with fake offers. she said nothing and walked away. What makes me so angry is if I had not started using the self checkout service I would have never noticed that the items I bought on offer were not on offer at all.