Critics of this update cite the modest body of research into the validity of DMDD as a viable diagnostic entity, as well as the worry that such a diagnosis could increase the number of children diagnosed with mental illness and subsequent exposure to psychotropic medications with potential long-term side effects.
From the Help link: Cancellations must be processed through a Comcast representative and cannot be initiated online. Please contact a Comcast representative at 1-800-XFINITY ( 1-800-934-6489 ) to cancel your service.
1 Fax Number: All fax communication with the corporate office should be sent to 1-215-981-7790.  Email: Though there is no dedicated email address for Comcast headquarters, there is a feedback form suggested by the Senior Vice President of Customer Experience [+].