Same bike, same problem last week.
I had to screw a bolt in on the outside of the wedge and lever it out with a crow bar! Once this was out I struggled for ages with the other side (drive chain side). In the end I just used a wooden rod pushed through from non drive side and whacked it with a mallet.
I found once it was out and I could see the parts and understand it I will approach the same job with more confidence next time (ie, not afraid to apply force), although I rammed a tonne of grease in so hopefully will not be such a faff.
Don’t bother buying a pin wrench as you will not be using this to apply force. I made one out of a tent peg bent in a wrench. Was fine for holding the bottom bracket in the correct position whilst tightening things up. I do not think a purpose made tool would have made the slightest bit of difference.