Fissler Vitaquick Pressure Cooker Leaks Water and Fails to Cook Properly

My Fissler Vitaquick pressure cooker does not cook food because it leaks water from the handle and takes in air. This makes cooking impossible and causes significant inconvenience in the kitchen. I have had this problem for the last 6 months but postponed addressing it because the warranty was advertised as 10 years. However, when I finally called the service, they claimed the warranty period was only 2 years and had expired in July. Considering the brand's reputation and high price, I expected a premium product. It is advertised so much, but it is a complete disappointment. From what I see in the comments, everyone is experiencing the same problems as me — it is not worth the price!