Discovery Miles

I am highly disappointed. I am for years on Diamond status an got maximum points and miles for all my credit card purchases. Since I moved to Discovery Bank/ Credit Card, I only get 1 mile for every R100 spent. I contacted Discovery and they have moved the goal post. Now you need at least a 'Black' Credit card and a whole suite with certain conditions to get the maximum miles. The system is now so complicated that not even the Call Centre can assist. the requirements are now so difficult because it is not that easy to move accounts and bonds between banks. This changed me from a very 'Pro' Discovery fan to a Anti-Discovery activist. I lost a lot miles during this festive season. How can I trust Discovery if they keep on changing the goals on basically all their products