I can help look further into this. Could you verify the username you are using in a private message? To send a private message click on my name "ComcastChe", then click private message me.
I can help you get into your account as well. Let's get your account verified so I can isolate the cause of this. Please send me a private message by clicking on my name, "ComcastChe" then click private message me. In the body of this message please verify your first and last name, street address including city state and zip code, and the account number or phone number associated with your services.