Never again Giesswein, with the poor quality! What...

Never again Giesswein, with the poor quality! What happened.
I bought a pair of Giesswein slippers for my wife.
After not even two full months, the wool flocking on the insole is off and the heifer rests on plastic. In addition, the shoes are extremely slippery on a slightly wet kitchen or bathroom floor and the profile of the sole is already partly gone. The shoes look a lot better than they really are.
The seller only tells me succinctly: "There is no manufacturer fault here, but the slippers
run through below as above. "
Slippers that are not suitable to be worn for about five hours a day (and you are not constantly walking around during these five hours) are conceivably unsuitable for their purpose!