Firstly, remove your puller, clean the threads on the crank, (check for a washer), screw the puller all the way in, use a wrench to make sure it's all the way in. Then proceed to remove the crank as your normally would. When you get as far as you can by hand, hit the puller handle or wrench with a dead blow hammer. Start soft, then harder until the crankk comes off.

Good Luck