Hand felting is not always going to produce the results you want on a larger scale item (or it will take a lot longer than 30 minutes.) I personally only utilize hand felting for very small items like coasters and such.
If you do have a washing machine available to you, you can try felting it down some more, soak it in the hot water for 15 minutes first before starting the wash cycle. It might take several cycles.
Another option with hand felting is to "shock" the wool into felting, assuming you were hand felting in hot water, you can take it out of the hot water and quickly submerge it in cold water. This will sometimes heighten the felting effect.
If washing machine is not an option to you, blocking felted items is possible generally, it's merely finding an object large enough and the correct shape you want to block it in. I am using Wendy Knits' Kitty Pi photo as an example:
Well-felted items can typically be cut without trouble; however, if it is not felted quite tightly, I wouldn't recommend it.