Hi Justin, have you actively created an account for yourself? Are you using the same email address you purchased with?
We do not make our customers register an account with us when they purchase; they just specify an email for correspondences.
If you do want to register an account, you can do so here: https://huel.com/account/register (using the same email as your previous purchases). This will link up your past and current orders to your newly registered account.