Sir for my issue,

my Galaxy S8 won't charge anymore using the usb charging port. When I connect the charger nothing happens so I take the lead back out and I notice a slight electric burning smell from both the USB charging port and the end of the charger itself. I tried using a brand new Samsung fast charger and the same thing happened. My phone didn't charge and once again I noticed a slight burning smell. However, my phone still charges when I use a Samsung wireless charger but this option is not really ideal for me as firstly the charging time is significantly longer, and secondly, I go on quite a few long journeys and therefore have a couple of battery packs for this reason which obviously only work using the phone's charging port. Has anyone else experienced this or know what the problem is? Is it something which is repairable and can I do it myself?
Many thanks.