I get pop ups every time my payment runs out, I don't have to do anything since its all on direct debit - not sure about the message, ensure you have malwarebytes run a Scan and w/e virus software you are using too.
You won't get booted after your time runs out anyway, once you log out you won't be able to log back in without getting more gametime.
Necroed, so I'm locking this.