Thanks for reaching out and we're sorry to hear this! We know how important it is to access the billing for your account as well as easily reach Customer Support. So we're glad you found us here in the Community! Often times, error messages like that can be related to connectivity issues. Please try the troubleshooting listed here and if you're still experiencing errors feel free to send us an email at
social_support(at)constantcontact(dot)com. We'll need you to include your username, a screenshot of the exact error message and a reference to this post. Thanks!