Scale deposits should be treated regularly. Pour 250 ml white vinegar into the tank and then wait until all of the scale has dissolved. Rinse with plenty of clean water and wipe with a damp cloth.
After following the instructions in the user manual for starting the appliance, make sure that your electrical socket is working by plugging another appliance. If it still does not work, do not try to dismantle or repair the appliance yourself, instead, take it to an approved repair centre