I'm assuming this number is either a model or serial number which doesn't work with popular brands. Please enter a manufacturer and a model number and i may be able to help you. Thx
https://www.neff-home.com/uk/service/support/fridges-freezers
Try this site - you may need to go to the bottom and look for support - then they will tell you to pick an appliance - scroll to the right to Frig/Freezers and look for or e-mail them for support there
First, try turning down the temperature control on the fridge incrementally and see if that gradually over time helps. If not, you may need to unplug the fridge for 15 or so minutes, hope it will recycle and then plug it back up, setting the control to what would be normally considered to be a moderate setting. If that fails, call a fridge repairman who you trust, , ,