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Payment for the premium service has failed.
So we can ONLY use this chat to help you now.
There is really not much I can do for this situation.
it might be that your GMail has been placed on the BLACK LIST for some Service providers.
That is why your comcast email isnt getting your emaisl from Gmail.
Why not try sending emails to your comcast email from a DIFFERENT Gmail account? Just make a new one.....it only takes a minute or two.....and that would narrow down the issue further.