Ionic iOS publishing help

hi there
i am finalizing my project, in the emulator everything is fine, but i need some help in the publishing process for iOS
tasks will the following:
1- app will be added as an update for an older app already existing in the appstore, it will require a rename and then packaging the ionic app for release as an update
2- while the the update is being processed, integrate any testing tool to test the release on real devices

and thats it
i been throught the app store publishing process before, and i know its a pain in ars if you dont know what your doing which is why i am posting this here (tight deadline)
please either contact me here or at a7medo778(at) if your available

with regards