Hi @Hudda, thank you so much for reaching out to us through the Roku Community about this. Generally, you can get in touch with someone by visiting this link: https://support.roku.com/contact-support/contact-options but we're happy to help! In regards to your question about Xfinity, we can confirm that the channel that you downloaded is the only one we currently have available on Roku. There is no other Xfinity channel at this time.
If you aren't seeing all the channels available that you would normally see, we would have to direct you to their support team. They manage the Xfinity channel and will have a better idea of what's going on. You can get in contact with them here: https://www.xfinity.com/support/contact-us. If there is anything else we can help with, please let us know.