WMF Kitchenminis Smoothie To Go - Button and Spring Issues After Minimal Use

Five days ago, I purchased the WMF Kitchenminis Smoothie To Go. I have only used it twice, making one orange smoothie and one carrot smoothie. Despite this minimal usage, the button and spring have popped out.
How normal is it for a brand that is sold at twice the price of its competitors to have a button malfunction after just two days? I expected reliability from a German brand, and I have experienced the opposite.
We should not have to run after customer service; I kindly request that you improve the quality of your products. Thank you.


