Iphone 6 plus wont charge

Hello and just recently my phone has stopped wanting to charge. I have tried several different chargers and several different sockets and none of those gave any sign of life. When I try to turn on the phone when it's on the charger it shows the battery is low. (in the red and blinking)

So it looks like the right phone in the picture before I plug it in and when I plug it in it looks like the left but after further inspection and waiting it still wont charge. I've given it 2 days to try to charge on many different charges ranging from apple chargers to amazon chargers and even off brands to see if anything will happen but nothing has changed. Any help or information would be helpful... Thank you. Also I had this phone for about a year and a half and I was thinking the charging port needs to be replaced or the battery.