Wrong info and lack of communication

I called in last Thursday to have a secondary card on my account replaced because my wife had a change in title. I was told by the agent that assisted me that her old card will be valid up until she activated her new card. That was not correct and on Friday my wife went shopping and her card did not work. I had to leave work early to go and swipe my card instead. Even worse than the wrong info was that I called in and spoke to a manager on Friday and he promised to look into the situation and get back to me. Still nothing has happened. I am a huge fan of Discovery, I have car and household insurance, medical aid, vitality, investments and the credit card and this is not the service I expect.