Hi Frighter,
First, thank you for the detailed explanation.
Regarding the issue, both possibilities are equal, but you can try few things to attempt resolving the issue first:
-Try a different cable, preferably an original Sony.
-Make sure that the charger port is free from lint, dust and moisture. A blocked port can prevent the USB connector from fitting properly, and therefore prevent charging. Ensure that the USB port is completely dry, and gently remove any lint or dust using, for example, a wooden or plastic toothpick or a toothbrush.
-This link has more steps to try: https://cutt.ly/dwBlU4Tc
-Don't miss this step, it sometimes works wonders: https://cutt.ly/fwBlOTJw
I also have some follow-up questions, does it give you the option to charge or transfer files when you connect it to your computer?
If you wiggled the cable, does it pick up?
If yes, these are signs of a damaged port/charger.
If all failed, your phone might need to be sent for inspection/repair.
You can book it for repair in the UK from this link: https://sony.sbe-ltd.co.uk/callcenter/booking
This is for IE: https://www.fonfix.com/
No need to mention that probably your phone is out of warranty.
Let me know if you still need anything else.
BR,
Hannah
