It will be possible to reflect this problem to the online platform of your exchange and ask the online platform to take restrictive measures.
EBay will cooperate with the relevant departments of the German government to investigate the sellers and accounts that may have value-added tax (VAT) non-compliance within the scope permitted by law;
And after receiving the notice from the German tax authorities, it will take restrictive measures against sellers and accounts that are deemed to be non-compliant.
The above restrictions include, but are not limited to, taking off related articles, restricting publication and sales to German buyers, etc.