Earth cable blown, switch tripping, electrical

This electrical socket was not mounted snugly to the wall (see pic 1) and I believe some liquid got into it. It blew and the Earth cable is now black (see pics 2 & 3). This has caused a switch to trip, killing several other sockets too. These dead sockets are all in the kitchen so I need whoever is repairing to do so soon, ideally today or tomorrow. I don't know what to expect cost wise so just putting in 50.