Water will not stop when level is rea...

If the water will stop when you turn the washer off then the problem is the water level switch. It's a switch connected to a hose which goes between the inner and outer tub. You can blow on it and the water should cut off. The filling water puts pressure on the switch with the air in the hose.
If the water doesn't stop when you cut the washer off then the water inlet valve is probably stuck open. The water supply hoses on the back connect to the valves.