Worst sign up process

The application process is a nightmare!! I have been back and forth with getting documents uploaded to the mobile app, then told to upload more documents, which the application and website does not allow me to do. The call centre agents then tell me the documents are fine and that there shouldn't be any need for further documents, to only then be sent another mail to upload the documents I have already done. Then get told to upload a new document that was required, which again, the website or the app does not allow. Emailed the document to the credit department as requested, to only be declined a day later because I didn't send the document. Now get told that I have to start the entire process all over again?? If it is this impossible to open an account, I can only imagine what it would be like once there is a legitimate problem with my account later on.