You should use the special blades for frozen food. To do this, plug in the appliance and start it up by pressing the switch. Important: hold the blades over the frozen food that you are going to cut and move them backwards and forwards to facilitate the operation. These blades are especially designed to improve cutting and, in particular, for cutting food with a crust (bread, meat, etc.).
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