How do you change the phone number the code is sent to, to authenticate a shared user with the invite

How do you change the phone number the code is sent to, to authenticate a shared user, when they accept the invite?I deleted the shared user and re added her, but it only asks for her email address, not her phone number, and then when I send the invite to share, it sends the authentication code to her old number.I tried the chat, but all they did was send me an automated reply telling me how to add a user, which does not answer my question. I wasted nearly 2 hours on that chat, to then be cut off because your staff took too long to come back to me. The second attempt, I missed the reply, and was cut off because I took more than 7 minutes to reply ( a bit rich considering how long I waited). On my third attempt, I waited 1 hour for someone to reply, and then gave up. This is not good customer service at all. My wife needs to have access, just like I do, as I am not always there. As for COVID19, you've had 2 years to get setup to operate with it, so that's no excuse anymore. The fees charged are what I would consider premium level, but the level of service I've had since day one is crap. Get your act together!