Stop using the appliance and arrange qualified assessment. Do not tape over damage, splice the cable or move the fridge in a way that may pull the damaged section further.
What the observation tells you
A visible mark can involve insulation or conductors, and a photograph cannot establish electrical safety. Touching the area while connected is unsafe. If the plug or socket cannot be reached safely, avoid handling the damaged equipment and obtain help with safe isolation.
A useful next step
Keep people away from the hazard and make a separate plan for chilled food. Give the model and describe where the cable is damaged; cable replacement must follow the appropriate competent procedure.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.