I'd turn off the water to the toilet and try the boiling (I'd use almost boiling) water several times. For the back of the tank fill it with almost boiling water. You don't want the wax sticking further down the pipes

If worse comes to worse, pull the toilet and stick your hand up from under the bottom. You might not be able to do this with a newer toilet.
I had a bar of soap get flushed and I had to pull the toilet and remove it. YUK! it was still in the wrapper and mushy from the water. The wrapper prevented it from being flushed.
Pulling the toilet isn't very difficult.
Good luck with the hot water trick