Looking into your account, your subscription is indeed for a very low frequency (1image/30s). This means that there will only be 1 image uploaded every 30 seconds. It also seems that you have your camera set to upload footage only when motion is detected, but your subscription permits continuous upload. If your motion sensitivity is set too low, then it might not be able to pick up the activity in your scene. These are all settings that you can manage from your camera configuration pages.
Please also note that your camera upload resolution is set higher than what you subscribed to (you ordered 640x480 but are uploading at 1280x720). You will need to make sure that parameters match your subscription.
If you would like more comprehensive support for your camera configuration setup, please email us at firstname.lastname@example.org with screenshots of your configuration pages so we can point you in the right direction.