Hi there, Sotano26. Welcome! Thanks for coming here for support. Here is a link that includes a few different payment options: https://www.xfinity.com/support/articles/one-time-bill-pay-options-through-my-account. Let us know what other questions you have.
I ended up not hearing back from you on this, Sotano26. I have completed the interaction. If you need further support regarding a payment, please create a new post with the details of your question/concern/request.