Security verification failed

hello It's been a month and I still can't change my phone number due to this issue.. Does anyone know how I fixed this problem? all I want is help 😭 the customer service didn't do anything on this issue. I've been logged into my account for like 1 month and passed the security check but still ain't working. though I can receive login protection settings (secondary verification), yet here when I'm changing the phone number cant. please help I'm begging 🙏🏻 thank you