Vestiaire Collective review: No answer to my simple question. Thrown out of several chats, because they don't want to answer me?

I have sold a bag on Vestiaire Collective. Because it was my first time via this platform (or any other similar platform) I asked to have the bag checked by them. They sent me the report, wich told me that there were stains and scratches that the seller didn't mention. Ok I could live with that, after all it is a vintage used bag. But the 3rd point in their report just said 'Material error'... without any other explanation and with a picture that doesn't show anything. So I asked what this meant via a chat... I only received an anwser so much later that I only read it in the morning. The answer was actually a copy-paste of the report, without extra information. I was thrown out of the chat, because I only saw this in the morning. So I started another chat asking the same question, and another and another. In those 4 chats the either did a copy-paste of the report, still not giving an explanation as what 'Material Error' means. And on top of that, they just throw you out of the chat, because they don't feel like helping of looking for the answer? I canceled the sale, because I lost my trust. I sent a message to the seller and apperantly she also did 8 attempts to ask for help, without any respons... this is unexceptable not?

View 0 more photos