you sent me a message, but I couldn't send a private message, sorry because i'm new in Scirra forum. Can we discuss on gmail ? My mail : qngnht gmail . com
First of all: You need create a Adhoc provision ( require Apple account - $99 / year and a Mac - can use VMware Workstation )
Second : Export your project to Html5 in C2.
Third: Import to XDK project and choose iOS and fill information on project tab.
Next: publish using Cordova iOS ( not legacy ).
Final: upload to Appstore via Application Loader and fill information for your app on Itunes Connect => Done
A lot of problems you will encounter, I will tell you through gmail. I'm limited to write message here.