GamerMarkt Is Blaming Me for a Reclaimed Account I Sold but Didn’t Steal

I sold two accounts on GamerMarkt that belonged to a younger player. Days later, I received a WhatsApp message saying something along the lines of “The account you sold was reclaimed or stolen.” Naturally, I was shocked and confused.

I need to make it clear that I have nothing to do with this issue. I transferred the accounts as agreed, and I even linked one to my own email at the time for security reasons, just to help with the process. If the account was later stolen or reclaimed, that’s not my responsibility, and I shouldn't be held accountable.

How is this even possible? And more importantly, who is truly responsible in a case like this? I’m asking GamerMarkt to look into the situation properly and not shift blame onto innocent sellers. I need clear answers and immediate clarification, not vague accusations.