Ladder

I want to replace my pool ladder and it’s really stuck. I watched you video and search google.  I even took all the treads off.  I tried loosing the bolt and beating it down. One sides wedge moved a little the other side wont budge and even bent the bolt. I cant twist them at all with the treads off. I also have pb plaster it them now. They probably are 15 years old and probably never removed. Is my only option at this point to hire a professional? I just hate to hire a professional and have to pay way to much for the ladder.