At the vendor subscription page you can manage your subscribed vendors.
The subscribed vendors list:

The subscribed vendors list shows all subscribed vendors with crucial information about their membership. The list shows information about the vendor’s subscription group, the subscription type and the subscription fee.
You also see the date of the last payment and when the next subscription renewal is due.
The last row shows, if the membership is currently active or not.
Click on a vendor name to open the vendor details page in the administrator area, where you can change the group or check details about this vendor.
If a membership isn’t active, you can manually activate a membership. Click on “No” in the active row, to manually activate a vendor’s subscription.
Activating a vendor’s subscription manually will waive the current fees for the membership, as if the membership was paid by the vendor. The manually activated membership will be valid for the group’s period time.