Help with Samsung Galaxy Centura

A

AC Question

Recently my Samsung Galaxy Centura, that I purchased in June. Started to act funny, when I plugged it in , it would disconnect and reconnect a bunch of times in one setting. After that, it would show it was charging, but would just decrease in percentage. Then the only way I could get it to charge, was after 15 minutes if I sat it just the right way and never touched it. It would charge after that, well last night I fell asleep before I could do so. When I awoke this morning , my phone had shut off completly. No matter what angle I sit it, or if i've taken the battery out a thousand times. It will not even come on a charging screen. I've tried using different charges , that didn't work, the battery isn't buldged, so it can't be bad. The only thing I can think, is it's the charger port. Can I fix this myself? Or can I send it to Straighttalk and have them fix it? Or will I have to purchase a new phone all together?