Can’t login, need to change current subscription

Nelliec Thank you for taking the time to reach out to us here on our Xfinity Forums. I would love to help you review new plan options to meet your needs as well as see what's happening with your login. To get started, please send us a DM to Xfinity Support with your full name and address. 

To send a direct message:
Click "Sign In" if necessary
Click the "Direct Message" icon or  https://forums.xfinity.com/direct-messaging
Click the "New message" (pen and paper) icon
The "To:" line prompts you to "Type the name of a person". Instead, type "Xfinity Support" there.
As you are typing a drop-down list appears. Select "Xfinity Support" from that list.
A "Xfinity Support" graphic replaces the "To:" line.
Type your message in the text area near the bottom of the window   
Press Enter to send it