This appears to be an international model. We only support US models here, so to receive assistance with your device, please visit: this link. Thanks!
I too am having the same issue with my Q7 55". It started this afternoon (11/18/2018). The line appears about 1 foot from the bottom of the screen and everything below it has a blur as if the picture is showing double with a 1/4" offset overlayed. I have tried resetting everything and different inputs (inernet and over the air broadcast). All are affected the same way. Any assistance would be great.