Tmobile Website and App not working

I am just trying to view the balance on my bill, but I have been blocked from logging into my account. I have been asked to log in multiple times, and sometimes I will get an error saying that my phone number - the phone number with an open line that I am PAYING FOR - is not recognized. I have had to reset my password multiple times just to get a blank screen where my billing information should be. This is unacceptable. I should not have to call or use chat multiple times a day to get basic information the website and app should be providing.