The red warning light is just telling you it's too warm in the appliance.
Can you post the actual model number of the appliance please?
This will be on a label inside the fridge, sometimes behind the salad drawers.
Thanks for that.
Is the display lit up?
At the bottom rear of the appliance is the compressor.
Is this running?
If it is, is it very hot?
Inside the freezer, is there ice under the bottom basket?
The evaporator is at the top of the freezer, open the cover over it to see if it's blocked with ice.
Let me know what you find.
Open the freezer door.
At the top of the cavity, you'll see the cover over the evaporator.
Do you hear the fan inside the freezer running?
Basically, the evaporator is blocked with ice so there's no circulation of cold air.
You'll need to find somewhere to store your food first.
Once the freezer is empty, simply switch it off and leave it with the door open for 24 hours to fully defrost.
Once fully defrosted, turn it back on and it should work again.
Alternatively, empty the freezer, unplug it, take the cover off the evaporator and use a steamer or similar to defrost all of the ice in the appliance.
Hope this helps
Let me know how it goes or if you need more help