Late 2011 MBP Charger Port burnt.

Basically my charger port where my magsafe goes in is burnt (Randomly, God knows how.) and this is making my charger turn on/off randomly and it's starting to ruin my battery. Anything I can do or have done as this has literally happened on it's own, I haven't put a lighter to it or anything. It's just a really strange thing, half of the port is black, and there seems to be some on my charger as well. Either way very unhappy as it's under three years old and I don't overnight charge etc. but anyway, it shouldn't be burning itself alive!