Just don't!

I used the banking app to apply for a credit card. I was unable to upload my supporting documents, as the banking statements were too large in size to be uploaded and I don't have a salary slip as I'm a sole proprietor. I phoned and was told by the consultant to email my documents. I then got a reply that my application expired. I went through the whole process again, just to be told that I should use the app to upload my documents as Discovery Bank Credit wasn't able to upload the documents themselves. What the hell am I to do? It's impossible to become a new client of this Bank. Just don't!