We assume you mean the freezer is also not freezing???
On a good fridge sometimes the freezer will be at the right temps, but the refrigerator will be too hot. If this is the case then we will look for other issues. If the freezer is not getting cold then most likely you have a ruined cooling unit. If you are handy you can replace it yourself as mentioned above, about $600 for a rebuilt unit, or just get a new one. Freezer should be 10 deg F or colder if Im not mistaken, not 30.
Im not in the group that thinks a household fridge is the way to go for camping.
Your other option is a DC powered fridge that is, like the residential fridge, run off a compressor, but it is far more efficient and uses DC power not AC power (direct current off a battery vx alternating current from a plug). Danfoss compressor!!!
The DC fridges "run" off of AC in that you can plug them into a plug and the fridge itself will convert the AC into useable DC power. Sometimes 24 volts when using a plug, and 12 volts when using the 12 volt camper battery. All you need to know is that it will run off DC power and be way more efficient than running a residential fridge off a battery through an inverter.
Sorry to hear you have a dead fridge, many of us have been there too.
Sell it, you might get lucky and find a buyer that wants to do the repairs, and you might get $100 or so for it.