Are you sure you can re-assemble this once you finally get it apart? There seems to be a lack of knowledge on many levels, a lack of appropriate tools (what you want to do can be done with an air chisel and a punch, but should it?), and, perhaps, a lack of patience.
Go to Canadian Tire, get a starter punch of the appropriate diameter (a starter punch is a drift that has a long taper ending in a flat, squared off diameter it is stronger than any pin punch when starting stiff pins), properly support your work and use a good penetrating oil (the ATF/acetone works well), allowing it to soak in and work overnight, then drive out the pin with a couple of sharps taps. Once the pin starts moving, STOP using the starter drift and switch to the proper pin punch.
no one uses starter drifts anymore, just rather bust up a good pin punch hammering on it til it breaks. But, no one uses correct taps to thread things either...or easy outs properly... Too much hurry today!