I'm frantically trying to update five mobile applications that have been neglected for way too long, managed to get an update published for the first one just last month, but now I'm stuck trying to release an update for the second one. The only real difference in the overall process between these two is that the first was not "removed from sale" by Apple's automated systems, where the second one has been. My app update is built and uploaded to App Store Connect, it shows up under the "TestFlight" tab, and it shows in the TestFlight app on my iPad, but when I tap "Install" I get a message that reads "Could not install [app]. The requested app is not available or doesn't exist." The app in question works with proprietary hardware that I cannot send to Apple for the sake of their internal review process, but I cannot make a "tech demo" video showing the app working on my iPad because TestFlight refuses to install it... Please can somebody help me work out what I'm missing here?

Good day, I'm trying to resolve the EU "Digital Services Act" compliance for my employer's Apple Developer account, but I'm stuck on verifying the phone number. The email verification code came through without any issue. We are located in South Africa, with a "+27" area code and the number I need to use here is a landline that comes through to the receptionist at our head office. This number does not have the ability to receive text messages, so I selected the "Didn't get a verification code?" link and chose the receive a phone call instead, however the call never comes through. Calling the number from my cellphone goes straight through to the receptionist, there are no digital switchboard prompts for the caller to select from. I tried this numerous times this Friday just past, and again twice now today, still no luck. I've requested an official document from my manager to see if I can go that route to verify the details, but so far nobody seems to be able to find an appropriate document for me to use... :( Is there anything else that I can do here?