Hi..
I'm experienced, educated (35+ yrs in music) trusted freelancer.
In my audio-studio I work at last professional soft+hardware from Cubase, Yamaha, Izotope, Melodyne, SyncArt
I worked in the past with exactly same kind of projects- starting from sent vocals ending with full professional song track..
pls check 1 of examples in my portfolio called "Voice Edits - pitch-tune, +harmony voc, mix-mastering" /with phases of work with that song/, ... then -pls send me your vocal tracks, and let`s chat about your idea, to bring your song to life asap and with top level...
rgds
Peter