Smart HUB V3 died! (Germany)

My SMART HUB V3 ( bought in March) died! Power Adapter 5V is working, HUB is OFFLINE an LED is OFF! No way to awake him again!

Called Samsung Germany Hotline on Monday! No help - spoke with 3 Persons - some even know what is the HUB! Finally I got a CALL Back option on Thursday - 4 Days later!!!

Terrible support!!