Hi Bill,
Try to work on the receiver from behind. You may get a small screwdriver or wedge between the frame and the bottom part of the receiver, just beside the 'ears'. Take care not to damage the center part of the rear end of the frame. That's a fragile bit.
Also, take time to relax. You can really get carried away while working on something that's stuck. Just put it down for a few minutes, relax and then try again. I speak from experience
The bolt may be stuck behind the sear bar. You may want to try and free up the sear bar so the bolt can slide out. Also, is the ejector spring still in place? Or maybe hold-open spring is stuck in the upper (blocking) position.