Declined amazon transactions by Standard Bank

If I could give Standard Bank 0 stars I would. I frequently purchase goods from Amazon.com. All of a sudden all my amazon transactions are being declined on my credit card. I have called Standard bank's help centre every day this week. Every day I am told it is a technical issue and lots of other people are experiencing the same problem. They take an average of 20 min to answer the phone and every time I am told they are working to resolve the issue!!!!! In the interim I need products for my business which thanks to Standard Bank I cannot access. After being with Standard bank for 40 years I am looking to move my accounts elsewhere!!!!