If you are a Comcast customer who would like to report an issue or you have a question about our new or existing services, please call Comcast at 1-800-Xfinity (800-934-6489). Comcast does not charge for service appointments to repair Comcast-owned facilities or equipment rented to you by Comcast. However, charges may apply for service appointments when the source of your service problem is not Comcast-owned facilities or equipment rented to you by Comcast. Comcast Customer Service