I agree with all of the above posts, everyone is giving you excellent advice.
The temp is too hot, that is plain, and *could have* attributed to the death of your first dumpy. What I've done in the past, is get a freezer ziplock bag and fill it with ice cubes then place in an area of the viv that the frog doesn't typically go to (or hang from the top, if you can). This along with a little computer fan placed atop your viv should bring the temp down. Though dumpy's are typically very hardy and able to withstand a wide range of temps, the high temps are a problem... you have got to address it. The frozen bottle of water is also a very keen idea, but if you have ice cubes and a baggy at hand, you can immediately address until the water in your bottle freezes.
My other thought is that a dumpy with no appetite is a big concern. These frogs have a vivacious appetite, so that would be a big concern.
What I would first try, is a pedialyte soak to get the nutrients and electrolytes back into your frog. This will also give him the energy he needs to eat on his own.
The ratio is 10 to 1, water to pedialyte (plain unflavored, found in the baby section of most drugstores and grocery stores). Use treated water for this mix. Soak him in the luke warm bath for about 10 minutes. I like to use a tupperware that I poked holes in (from the inside of the lid). This helps to keep the frog in the solution. But, the fact that you say he jumps on your face (LOL), says to me he has energy and may eat soon.
Repti-Boost like Carlos suggested is a very good emergency product for malnourished or dehydrated amphibians. I've used it before, and it was a life saver.
Also, I recommend using a glass bowl for your feeders, crickets specifically can not jump or climb out, and this is a great way to monitor your treefrog's eating. You can dust the crickets with the repti-boost also.
Lots of advice coming in I;m sure. My final recommendation would be to listen to everyone here, and follow the advice.
Good luck.