There is a window between the freezer and the fresh food compartment with a gate. The fresh food compartment cools down with the cold air coming through this window.
There are two knobs to control temperature in both sections. With the right knob you operating the thermostat and when you turn the left one - you should open or close this gate to let more or less of cold air into the fresh food compartment.
Looks like this window is completely open. Also possible the thermostat (or the temperature control) is not working properly.
- The part number for the temperature control is AP2061661
Here are the break down diagrams for the Hotpoint refrigerator Model CTX21EKCR
P.S. You have to wait about 24 hrs after every temperature adjustment to see a result.