Second account created when upgrading service plan

Appreciate the quick response - to be clear, I went into my account and requested a change of service to a plan that was presented to me as an alternative/upgrade.  At no point did I ask for a 'new subscriber' plan or do anything that would indicate that I was doing anything but modifying my existing plan. 

I would like help resolving this becuase I now have 2 accounts that I am being billed for.

Thanks for the additional details, @user_hcv7tc. We can discuss options further. Please send a direct message to us by clicking the chat icon in the upper right corner of the page, click on the pen and paper icon, then enter “Xfinity Support” in the “To” section. Please include your full name and complete street address.

I’m having the same issue and went to manage plan and had no reason to create a new account but how am I supposed to be charged $100 on one and $113 on another 

We're sorry to hear that this issue has occurred. We can assist in removing the errant new account, and help work with you on the existing services to find the best plan offers for your services. 

Please send a direct message by clicking the chat icon in the upper right corner of the page, clicking on the pen and paper icon, and then entering “Xfinity Support” in the “To” section. Please include your name and address, and we can get started anytime.