Hi
Its more likely that the freezer section is choked up with ice thus not allowing airflow to fridge.
There are numerous reasons that can cause this from basic ie leaving freezer door open by accident for a period to the intense ie defrost heater/thermostats etc.
Ideally you need an engineer. Hopefully some UKW engineer may pick up on this.
Failing that you could contact the manufacturers Maytag for some assistance.
If you telephone the call centre on 01737 231 000
They will arrange for a service engineer to attend, or offer a telephone number of a Admiral Service Agent.