Unzip and expand a corrupt 7zip file

I need assistance unzipping and expanding a corrupt 7zip file. The file extension is .7z and it's password protected. I have the correct password, but I'm unable to open or unzip the file. The goal is to be able to extract the files so that they can be used. I need someone who is experienced in data recovery to help me open and expand this file. Any help would be greatly appreciated. I can redownload the files which are 1500 mb each, archive size is 250gb.