Wrong price on website!

I Called Mimmos Moreleta Park to place an order on Saturday evening. (9 Oct; Call & Collect) I went to pick up my order and the price was almost 50% more than it was advertized on Mimmos website. I asked the waiter why is this? his reply was that many clients complain about this and he called the manager. The manager informed me that the price I refered to is older than 5 years and that is what I must pay. If it was not so late, Iwould have left and get food from another place! MIMMOS wil not see me ever agai as an client!