Why is my domain is no longer connected to my website?

Finding an error page, website not found, or other forms of site redirect? It may be for the following reasons?

• Domain Renewal with your domain provider has not been renewed or canceled for the following:
• Credit Card Info on file has expired
• Credit card not on file or has been removed from your DNS provider account which automatically renews your domain payments based on the schedule you set when you purchased your domain
  
• Your domain's DNS records have been altered or deleted
• Your eCommerce Software service plan has not been paid, therefore canceling your website's premium features of which connecting your domain is one of the included features.