Trying to be very smart but stumbling on the basics with really bad customer experience

I have been trying for 2 months to get a sponsored Discovery Bank credit card arranged for a family member on my card account. The process through the app is not working and there does not seem to be a manual process to get past the issue. I have spent hours on the phone during several telephone calls. Can someone who is competent in a position of authority to get this resolved please contact me?