Here is interesting video prepared by occasional InsideEVs contributor, David Murray, on repairing a damaged EVSE charging cable.
In this particular case we are looking at the Chevy Volt's EVSE attacked by a dog.
This kind of problem will appear from time to time, but the fix is simple. There are just 5 wires.
Remember to proceed with caution, provide a strong electrical connection and test charging for some longer amount of time before leaving the EVSE on its own.