Unfortunately, Comcast does not provide any information about how to get them to call you back or email you on the company website. However, according to the Comcast customer service page at pissedconsumer.com, you should be able to reach out to the Comcast customer care team for assistance: b
y phone at (800) 266-2278 (toll-free number within the United States);
via the company's social networks;
by mail to
1500 Market Street Philadelphia, Pennsylvania 19102-2148 United States.