I had a task running which would scan all incoming calls on all SIM cards. It then checked the numbers for known contacts and if they are unknown it would check if they called multiple times. I made it because I was bothered by a lot of spam/scam callers. This task would block all notifications, vibrations and ringtones. So it didn’t bother me at all that they called.
Does your girlfriend use your devices or accounts? Seems very strange to me that they would do that. Or they want to fuck you over even more by making it less easy to deny that you didn’t create that account since the password is linked to you/your girlfriend. But then again, LE would need to be made aware of the password before that makes sense.