promises

Am I totally wrong being against the practice of producers of putting advertizing of products which are not included in the catalog?

My perspective is the following:
- We put advertizing with the product which is not included in the assortment of a company.
- The customer sees it, wants it, asks it.
- We can't provide the customer with the desired product.
- The client needs to search another way to get the product.
- The client is disappointed by the company.