My iPhone won't charge unless turned off

I have an Iphone 6 plus that I've had for about 2 years now. I recently got the screen and battery replaced in it last month and everything seemed to be working fine other than the touch disease it has. I was using my phone today like normal, but i noticed the battery getting low, so i tried to plug it up. The phone just wouldn't charge. I tried everything like cleaning the port, using different cables, wall adapters. Everything. The phone finally got so low that it turned off, but then it started charging again. It turned on and didn't charge past 2%. It's on a continuous cycle of dying and then charging to 2%/ If anyone know show to fix this, please let me know!!