Weird, don't see any of your posts regarding issues with the USB Charging port on your device, other than this one.
A Samsung Moderator suggested that you buy a new charging block & USB cable?
Regardless, have you opened the Samsung Members app & Click on Support > Diagnostics & View Tests, and run the test for Cable Charging?
This test should give you some idea as to whether there is a hardware issue with the charging port or not.
Depending on the results of the test, you may want to visit a Samsung Service center to get a tech to have a look at your device.
Here's a link to locate a Samsung Service center.
That's correct. You don't see any additional posts regarding a USB port because I didn't make one. So I don't know where that comes into the realm of relevancy. 😆
Yes, sorry I misread part of your post...
"I have already done what will be recommended by the moderator, gone out and bought a brand new Samsung OEM charger and cable, reset the phone, as well as factory reset the device. It does not solve the problem, the port itself shows no sign of corrosion, and does not even have a single fiber of lint in it".
I read this as you HAD been advised by a Moderator, not that you anticipated that you would have been advised to.
My error aside, have you opened the Samsung Members app & run the Diagnostics for the charging port?
Same issue here since the first day. It randomly accepts it as charging- or data port. It is really wobbly. Tried out everything and only use Samsung-cables.
Did you try Opening the Samsung Members app Click on Support & Diagnostics & View Tests then run the Diagnostics for the USB Charging port?
If you get any error, such as the one posted by the OP, then you may want to visit a Samsung Service center.
You could also try to Factory Reset, but if it's a hardware issue, then a Factory Reset won't fix the problem.
Here are the instructions for both Wiping Cache & a Factory Reset.
Power of your device & Wait a few seconds.