Did I ruin my file?

I started a genocide route, but before I defeated Sans, I reset and tried to do a true pacifist route. But- the problem is I never saved since the genocide route. And it played out like a neutral route. Asgore couldn’t be saved and I killed flowey thinking a reset would fix it. It didn’t. I reset again- hoping to do a true pacifist route but flowey is gone. I knew a genocide route could forever change a file, but I thought you had to finish the game- not start the route. Now idk if I can ever get my file back. Does anyone know what to do? (Bonus. When I finished the neural route I got a genocide save with the characters. Thought it was interesting)

I started a genocide route, but before I defeated Sans, I reset and tried to do a true pacifist route. But- the problem is I never saved since the genocide route. And it played out like a neutral route. Asgore couldn’t be saved and I killed flowey thinking a reset would fix it. It didn’t. I reset again- hoping to do a true pacifist route but flowey is gone. I knew a genocide route could forever change a file, but I thought you had to finish the game- not start the route. Now idk if I can ever get my file back. Does anyone know what to do? (Bonus. When I finished the neural route I got a genocide save with the characters. Thought it was interesting)