Question about Teufel Ultima 40 Aktiv

Hi i have ordered second-hand of this model (CHF 628) few days ago, and i only received a single passive speaker. no cables, no active spekaker nothing.. i contacted the team and they said they dont have the rest of the components. i trusted digitec because ads said that it was tested. why did this happen? how did you test them without components?

anyways, now i am going through a refund to order another one. Already, i wasted too much time because of this;;. How can i be guranteed that if i order this second-hand one again, i will get all the parts correctly? i do not want to go through this horrible disaster again... it was my first time ordering second-hand electronics from digitec and i was so shocked about how things were processed... could it my fault that i trusted the service without question? i have beeen using digitec for a long time and my trust came from the great service i always received... why did this happen?

The second hand item still has a one-year warranty and comes fully functional.