Is my salary unlawful or suspicious, and is dealing based on catalogs after the exhibition forbidden or permissible, knowing that I work as a warehouse keeper in a sewing company, and we send old models with the numbers and prices of new models requested by customers, by order of the company owner?

What you are doing by sending different models than those agreed upon with the customer is prohibited deception, necessitating repentance from all participants. The sin is not lifted by the order of the company owner, because "there is no obedience to a creature in disobedience to the Creator." You must offer sincere repentance and advise the company owner and your colleagues.

Your salary from this work is forbidden to the extent that it was in exchange for deception. This portion must be disposed of in charitable ways. The remaining part of your original salary is permissible. You must leave your work at the company if it obliges you to deceive people.

Dealing through sales via catalogs is permissible if the item exists, like selling an absent item with a clear description, or if it is a salam sale [forward sale] provided its conditions are met, such as paying the price at the contracting session, or selling by sample.

It is forbidden to use pictures of unveiled women in promoting goods. Part of complete repentance is informing those who were deceived of the truth of the matter. They then have the choice to either uphold the sale or annul it.