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And, use a punch as close to the diameter of the hole as you can find. A smaller punch will bore into the pin and expand it in the hole making its removal worse. Use a lot of PB Blaster. Put gloves on and see if you can cut the pin with a hack saw blade. Try grabbing the back half with vise grips and hammer them to move out the back half, then then do the front half. Or, put a screwdriver in the cut slot and hit it to drive out the back half. Punching out one stuck part of the pin may be easier if they are both stuck. And, ^, heat will help.