Word Document Scrambled

I have been using the online version of Microsoft Word via Onedrive.com. The document I have been working on does not exist on my harddrive. It only exists on my OneDrive. The word document is 67 pages long and 31,788 words in total. It is a cumbersome document to review, to say the least.

So, of course I was devastated when I discovered that Microsoft Word had glitched. Its not a minor glitch either. Its a radnomized duplication glitch. In some places one sentence is duplicated, one after the other. In some places a paragraph is duplicated, one full paragraph after the other. In other places, its all messed up. It has copied a single sentence and pasted it in the middle of another paragraph 1 or 2 pages away. One paragraph I saw was composed of sentences copied from at least 2 other paragraphs. This glitch has made a chimera out of a year of hard work. 

I had a chat message conversation with a customer support agent today while I was at work. We were unable to fix it. Although, he only offered me two things to try. He wanted me to log onto Onedrive.com from a different computer (in private web browser) and then log onto Onedrive.com from a different internet source. I was unable to log onto Onedrive.com from a different computer (in private web browser). It wanted me to either insert a USB passkey or scan a QR code with my phone for the pass key. I don't have the USB and when I tried my phone it just said that my phone doesn't have a passkey. My passkey is stored on my laptop. So, I was only able to log onto Onedrive.com on my laptop. Next, I tried a different internet source (in private web browser). It didn't work. The document is still scrambled eggs. After that, the customer support agent was all out of suggestions. He sent me here. 

The customer support agent did seem to think he knew what the glitch was from. He listed a few things. The ones that sounded possible were either Onedrive.com/word document timed out (maybe when the PC went to sleep) or the internet connect dropped. And supposedly those can cause a duplication problem.

Does any of this sound familar to anyone? Suggestions? I'm begging for a quck fix so I don't have to scrutinize 67 pages and 31,788 words.