I get this isn't something you want to hear right now, but what you're describing here doesn't sound like "ghosting". It sounds like someone who has made several, perhaps increasingly explicit attempts to reject you that you are trying to find a way to hear as an opening for a debate. This wasn't an open ended conversation. They probably cut off contact because they started to feel like you weren't getting the message.
Now, its okay if you're not in a place where you can emotionally move on yet. That happens. Not every relationship ends with both people on the same trajectory to getting over it. Honestly, I can't imagine many do. And I understand this can feel like a shock if they move on while you are still struggling, but you're different people and in different paces in your lives. The thing you do need to do, however, is step back and understand that its not her role to help you move on. That won't help you move on, either. Its just going to keep you standing in place, trying to figure out if there is a solution you haven't tried yet. There isn't. That's not how this works.
I know it probably sucks right now and I don't have any magic answer for how to avoid this part where everything sucks and hurts and feels inescapable. There isn't one path forward. Even as we experience it multiple times, it can still be a struggle. My last real heartbreak wasn't even over a relationship, but it was over two "situationships" that ended back to back. Neither was super-serious. One was a couple months as friends with benefits that I hoped might become more but was never promissed anything. The other was a very intense flirtation with someone who was in a bad place themselves and we never even got to the point of meeting up. Both broke off contact at some point and basically never resumed. And it left me very deflated. In hindsight, I can see both how I over-invested in each situation but also how neither really was going to be viable long-term. But sometimes, we can get lost in what we're hoping for in a situation. I found myself feeling very sad at the end of that, and even knowing that I didn't have good reason to be, that didn't prevent the feeling. I recognized that to some degree, I needed to let myself have the sadness so I could move on from it. Trying to deny it could let me to getting lost in it. When I'd get that way, I'd try to rationalize how maybe things could turn around. Maybe I could figure it out. Maybe they'd see things my way. Those are dangerous fantasies. It was better to let myself feel sad and recognize that I know learned that I did want to be with someone. I had been alone for years before this and mostly okay, but that situation made me feel like I wanted to make one more earnest try to find someone. That all took a while. Over a year. But I found my way forward. You don't need to replace your ex right now. You don't need to desperately try to fix this. You can be sad and lost and it can still be okay eventually. You don't have to know how you get there. That's not usually how this goes. Good luck.