Hi. Thank you for keeping your account up to date. However, since you are experiencing that I would love to give you options if the same code will still sent to your old phone number. I believed that you are doing the correct steps. If problem persist I will suggest to close your PayPal account and create a new one with the same information and update your phone number. Please visit
www.paypal.com and then sign up for free. You may close you account by going to your summary page and then you’ll see the “close/delete my account” at the button of the page. I hope I was able to answer your question. Thank you again and Stay safe.
