Unable to Add Unlimited Data to my current plan

@WhiteChristmas2023 thanks for your post. We can help you add the unlimited data to your account. Please send us your full name and complete address in a direct message.

(Full credit to @BruceW for this excellent explanation!) 

"Search for Xfinity Support" won't work. To send a "Direct Messaging" message to Xfinity Support:

• Click "Sign In" if necessary

• Click the "Direct Messaging" icon or https://forums.xfinity.com/direct-messaging

• Click the "New message" (pencil 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

•  - An "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

See https://forums.xfinity.com/conversations/email/cant-create-a-new-email-address/605e52b726aa974d63032d02?commentId=606107ea738c7f46a02b830e for an example.