Wow, your snake basically got cooked, and is in a lot of pain already.
See if you can get a dimmer(I think from home depot??), I heard they're cheap, like $10 and will work until you can get a proper thermostat. Very short term solution and if your room temps fluctuate a lot it will have to be messed with quite a bit, but better than nothing?
And please if you can't properly care for the animal, financial wise, rehome it to someone who can!