Can’t verify identity

I tried to make an order recently of two new phones but i’m unable to do so, I get an error when verifying my identity over and over again I tried online, by phone, and still the same issue persist, I’m exhausted by now it’s been 3 days trying to get help of someone from xfinity but nobody has an idea of how to fix this issue, I have tried all the ways already and they even gave me a number to call and I called this number and it just send me to other parts like support, sales, etc no one to help me just telling me the things I’ve done multiple times for the past few days and due to not being able to verify my identity my order has been cancelled more than 7-8 times in the past 3 days, I need help please