Welcome to the forum. You started me looking at the cost of a Sicilian Orange Panda. This is not good Mrs Panda Nut thinks 3 Pandas is enough!
Let us know what you find out about your Panda. Suggestions
Is the cooling fan switching on. Does ir run at both slow and fast speeds?
Check its really got water in.
Check the temperature sensor is working correctly
Check the radiator is not blocked. Give it a blow through with compressed air from under the bonnet??
If you have access to ECU scan you can see what the engine temperature is actually doing. This will verify if the gauge is working.
Changing the thermostat may also be a possibility to improve matters