Welcome to the Community and thank you for posting. I've moved your post onto its own thread as the other one had been marked as solved.
I'm sorry you haven't been able to claim your BT Reward Card. If you send me your details, I'll be able to do this for you.
I have sent you a private message with instructions on how to contact the team. You can access your messages via the envelope icon at the top right of the screen, or click on this link, Private messages