Water dispenser not working & fridge and freezer not getting cold

okay, most likely, your problem is your fan motor, its making your evaporator becoming a block of ice freezing your water lines but its not circulating the cold air through your refrigerator. remove the panel from inside the freezer and see if it has become a big white block of ice and the fan motor is turning. some fan motors will not work with the door open so you must manually press the light switch and see if the fan is blowing air.
if fan blades are not turning, replace the fan motor. but if it is blowing air and there's a big block of ice, unplug your fridge and let it thaw out. if after melting your fridge is running again, there's something wrong with your defrost system. that means check and replace your defrost heating element, defrost thermostat and or defrost timer.
i hope that helps with your problem. good luck!