They went unresponsive and then solved very nicely.
EDIT: After a while, they answered my complaint and solved it elegantly. They replaced it for free with free transportation. I was surprised! I ordered a dongle from them. It worked perfectly for two months. After that suddenly it stopped, so I contacted them. They went fully unresponsive. Even though, I just requested some advice on it. I assume they won't reach out to me, and I will end up with the damage.