Hi Ellen,
I have understood your issue.
I'm going to run through a few steps with you. Some of these are diagnostic — they help me narrow down what's wrong, not fix it outright. So if nothing changes after a step, that's normal and expected, not a dead end. I'll keep going until we've got this resolved.
There should be "I forgot the PIN/Reset PIN" option on the screen. In order to better help you, can you take a photo in your phone and post it in the next reply?
I look forward to hearing from you to get the results of the troubleshooting.