Badd service and public is mislead

I was provided with the MTN booklet that has all the deals they are providing currently. At hone I went through the booklet and found the interesting laptop I wanted. I went to MTN Westgate mall only to be told that they don't have any stock of any of the advertised laptops. They have never received stock and not sure if the stock will be delivered. Then I decided to go to MTN Clearwater mall. Also the same thing. How can such a big company advertise things they don't have on stock. I waisted my time and petrol going to their shops. This is really shocking and misleading the public. I will not do business with them.