Makro Online Purchases not in operation

Hi I am a customer at Makro and since last week Friday, I am trying to make a purchase. I click on the payment process for my bank card and follow the entire procedure. When it comes to payment, it just hangs and hangs. I called the call centre and was advised that the technician rectified the issue, to try again. I tried again and again. No success. Today same issue. Lerato and Sibongile, two separate calls, leave me on hold. No feedback. No callback? Why? Kindly respond. Kavita