Discovery Bank

We had a discovery credit card account and had to migrate to Discovery bank because FNB were no longer involved. My husband is the primary account holder and I am a secondary cardholder. I previously downloaded the app for discovery bank to have a look at what if offered. My cell phone was ****** and I have another device now with the same cell phone number. I had to download the app to be part of discovery bank as a secondary card holder after my husband decided to migrate to Discovery Bank, but it keeps on telling me that I already downloaded the app( yes, on my previous device before it was ******) The problem is that I now can't download it on my current device, thus I can't join discovery bank as a secondary cardholder to my husbands account. Numerous e-mails and phone calls later- there are still no solution for me