New sign-on alerts

I got a new laptop in late November. It obviously has a different IP address than my old one, so I wasn't surprised the first time I received an alert from CC about a new sign-on being detected. After I kept getting them every time I used CC, I called CS/tech support. To make a long story short, I've spoken to 4 different individuals. Each was helpful in suggesting ways to fix this, but as of today I have received 15 notices for this same reason. I changed my password; still got one. I changed my logon ID and got one. (It says the person has Windows 10 and my new laptop has Windows 11.)

I send out an average of 3-4 emails a week to our church members and every time I get another one of those messages.  The last person elevated this to the "tier 3" team. Alas, I haven't heard anything from anyone since. I believe it has been a week now. Has anyone else experienced this? And if so, was it ever resolved?