Default Note 3 charging problem

This morning my battery was dead and the phone was off.
When I used the supplied charging cable plugged into the wall, it shows the battery with the circle to show its plugged in, then goes to the battery with the green bar and switches off. It vibrates and then shows the battery with the circle and and then the charging battery, and does the same again.
When I turned the phone on it shows no charger is connected. I think it did show the power bolt in the battery after a while, but charged very slowly.
I get exactly the same with 2 different micro usb cables. Even when its stuck in this charging loop it is charging slowly as when I turn the phone back on the battery is showing a bit of green and not just ! in the battery,

I read on another forum a few people with the same problem, but they seem to be getting fobbed of and the cable blamed. I am 100% sure its not the cable.
So that leaves the port or something else in the phone.. But if its getting a charge from the cable.. it doesn't sound likely.

My PC does not detect it as a device though.

Anyone else on here experienced this?