Guarantee vs purchase slip

In Jan 2023, I received a Phillips Airfryer as a gift from a family member. Apparently this appliance has a year warranty/ guarantee. As soon as the year passed, the airfryer did no longer air-fry anything. I went to the store for assistance however was treated very cold because the guarantee allegedly passed and I did not have a slip of the purchase. I provided the store with the ID number of the person who bought me the gift in order for your office to trace the purchase made in Jan 2023, but no progress or update has been provided (2 weeks later). As this item is very useful in our household, I was forced to buy a new airfryer. Before I flush my uttermost heartless experience from a store I support quite often, is there someone that can assist me with this "what has become a nightmare" experience.