It's not linked to a firmware upgrade.. Yes it looks like an hardware fault.. What can I do ? I don't have any reparation center in my area...
Did you try to gently clean the USB-C port? It may be dirty.
If cleaning it can't solve your issue, as Neville says, you can try to replace the usb charging board by yourself, but remember that you may void your warranty with your seller. If you don't want to risk, or if you're not handy enough, consider contacting your seller to have your device replaced under warranty.
If you want to replace it by yourself, let me know and i'll post what you need here.