?'s. Have you tried backing off the brake adjuster (star wheel) Access through hole in front of drum. Turn it upward. Did you have a leaky cylinder?
Shoes can hang up or stick to drum. Park brake lever could be seized too inside holding front shoe in place.
If nothing else works you could grind off the pins that hold the shoes in place. You can see them on the backside of the backing plate at the 3 and 9 oclock positions. They look like a nail head. Napa sells replacements.