Everything is impossible with this company

It’s nearly impossible to open an account with them. Their website doesn’t work on a mobile and when you call in you told you must use a computer. They not willing to do the application for you. I just cannot log into my account using my username and password. Eventually I finished the application and today I am receiving emails to add my documents when I have already done so online. I sent a email a week ago and still nobody has responded. When I call up the customer service is completely useless.