Discovery Bank Disappoints

My husband and I recently upgraded our credit cards to "Black" so we could use airport lounges. After a series of rather tragic circumstances, we found ourselves in Port Elizabeth airport only to be told we had not spent enough in the previous month (September) to warrant entry. Our average spend with Discover c/c is +/—R20,000 pm, but it so happened that in September, we were overseas as someone's guests and had only spent R1,500. This seemed to us as very mean-spirited and certainly not something we had been made aware of when we upgraded. Once again Discovery disappoints.