Thoroughly unhappy customer

Credit card was blocked for non-existent *****, no notice given. Banking with Volkskas and then ABSA since 1976. So I arrive at a shop and my card gets declined. Had to struggle to get telephonic assistance, was then informed the card had a ***** hold on it. Called the ***** line and got the ***** lifted. My question is: In this day and age, is it really too much trouble to let me know my card has been blocked? No SMS, no e-mail, no whatsapp???