tv telling me we are not connected to internet on smarthub has always worked before Here's what I have tried so far: called comcast and they said...

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Phone Support
* called customer.
* not available
* left vm.

Thomas,
I would remove the power from the back of the modem and your router, wait a few seconds and replace the power cables, then try to connect your Smart TV to the web. I would ensure your Smart TV is connecting to the correct wifi network.

take care,
Bill

Thomas,
If you would like to continue to troubleshoot, I would be happy to assist you after you hear back from Samsung. If not, I can request a refund.
take care,
Bill