While the Marketplace will show what licenses you have, it won't show where they came from. You can use your server's main IP address to check the license status here:
Verify license. Our license verification tool will display the cPanel & WHM license history for a server and whether or not it's valid.
verify.cpanel.net
and that will show where the license was purchased.
If the license wasn't purchased directly from cPanel, you'd need to contact the license holder to see about the WordPress Toolkit issue, as that can be disabled at the license level.