@Kane99: I'm sorry to hear that you're experiencing this issue. For clarity, have you tried using another compatible USB cable, and connecting to a PC rather than a plug socket to see if the issue persists? Furthermore, can you try powering off your phone and then connecting to your charger to see if you're able to establish a charge in this manner? If not, try heading to the Samsung Members app > Press and hold on the app icon > Diagnostics > USB charging, and follow the on screen instructions. Does this test flag any issues?
Did you take your phone to a Samsung Service Centre, @Kane99? Have you tested your phone in Safe Mode? To do this, hold the Power button down and then long press on Power Off on the screen to change it to Safe Mode. Tap on this and your phone will restart. If your phone is fine during this, it indicates a third party app is causing the issue and we recommend deleting apps one by one until you find the culprit.