Can't log in as root user to avoid charges on account i don't use.

I am very disappointed with AWS at this point. I only opened this account because I was applying for a job. I had an appointment set and interviewer never showed up or responded. When I sent notification I was told I would be contacted and never was. Now I'm being told I may be charged for something I don't use. I have over 40 years of technology experience, yet cannot log in to clear my account. Granted I have not attempted login for a very long time, but I have captured enough screen shots to show this is not USER ERROR. I cannot log into account as root user even though I have the correct credentials. Hopefully you can respond before 3/31/23 avoiding any charges. I have exhausted way too much time on this so far. Any timely help would be appreciated. When logging in as root user, it accepts my password but does not send code. When I attempt captcha it fails after multiple attempts from mutliple devices.