corruption

Hi everybody, I need help abut a corrupted .doc file. I supect it got corrupeted after a bad save. It consisted in about 45 pages of plain text, arial 12 and very basic and minimal layout/format options (standard page, no tables, no images, no footnotes or headers, page breaks, nothing. just...

It took me a good enough time to download this heavy RAR file which is about 2.5 GB but to my utter shock it came out to be corrupted. I am no tech but I can follow as step by step solution if anyone can provide in an easy manner. I have already search over lot of internet pages but I couldn't...