Shocked beyond words

Shocking after more than 5 attempts I am still unable to register the MY difference on the app. The 1st login attempt was at the end of June, followed by 3 phone call attempts, followed by emails to customer services, also store visit. I have even emailed customer services and ops. I responded to an email yesterday ***5 and received postmaster delivery stating mailbox is full and can't accept messages now. My concern is that my account may be registered to someone else, because the error is the same. I have uninstalled and reinstalled and the result is the same. It is more than a month and it has not been resolved as yet. My friends and family have their cards registered already, so why is there a delay?