Hi... (with "contact-bid")
I`m Peter, an experienced audio-freelancer.
I worked with similar projects, I have in my own audio-studio special dedicated tools for such edits.. /from Izotope, Melodyne, Vocalign, Audition, Sonar,Cubase/
I place my bid as "contact bid", because I don`t know any details of your source recording as playtime, and problems="real ones to be corrected".. and I got no sample to check problems by myself .. /sometimes it is almost not possible to do such edits - it depends on sources/
I`m fair - I don`t promise miracles- I can promise solid work to do what I can, but "what I can do"=depends on sources and problems founds there..
let`s talk and clear all, then let start..
Peter