GALMAN in OZ,
Get your screwdriver and LOOSEN THE BRAKES with the adjuster as loose as you can get it, then gently slide off the drum WITH the hub if it's not loose of the lugs.
If that fails, and you can STILL spin your wheel, then your outer bearing is NOT frozen to the hub and axle snout.
Get a small grinder or a punch, and grind off the retaining pin back on the backing plate, like they already said. Then the brakes will come out with the drum, and your troubles are over. But you gotta use washers next time or get larger spring pin's to compensate for the huge hole you made...
Below is your Rear brakes (or a similar setup anyway) Which are identical to the FRONT brakes with the exception of the parking brake cable.
Do you see the blue springs on the left and right with the shiny silver cap holding them on?
That is the inner side of what you need to push through your drum, OR grind off the back side, so the entire assembly will come off leaving only the springs hanging you up, and doing this will allow the shoes to twist, and RELEASE the drum, but ONLY do this IF fully releasing the brake adjuster (that thing the guy's right index finger is pointing to) fails to release your drum from the shoes.
You will need to spin the adjuster with your screwdriver in the SLOT the tip UP then force the Handle UP and the TIP down in order to loosen your shoes.
I really hope this helps!
When Hitting the drum FRONT OR REAR, with your BFH to loosen it from the evil clutches of the Spindle rust or the Swagging, hit it HERE where I've outlined in RED, NEVER hit the BACK of the drum where the fin's are.
This will Jar it off in seconds. Hit it on opposite sides alternating. No swagging nor rust will hold it on if you do it correctly.