Since the compressor is running and you are not getting any cooling at all in the freezer I would say that you have a sealed system problem. Either the compressor is bad or all the freon has leaked ot.

This will be an expensive repair as you need a pro and usually it makes more sense to put the dollars towards a new unit.

One caveat is that if the unit was moved on it's side or at a severe tilt and plugged in right awat at it's current location then unplug it and let it sit for 24 hours. Then give it another try,