Decline inquiry

I have a problem with my account, I can't transact at all on my banking app I constantly get this error message "we apologize but at the moment is not possible to satisfy your request" , even my card can't withdraw or swipe at the shops I get a decline message. Basically I can't do anything. Please kindly assist I really need this matter dealt with urgently. My reference number for this enquiry is ***. I got a message that my matter will be looked into within 72 hours. It's too much 😢. So frustrated