Not all sellers accept messages and generally, there is no need to message a seller.
Can you explain how you are trying to message a seller?
This is a member to member forum and other members don't have access to your account.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)