network upgrade-Cannot order pixel 7 phone

Hi, I got a message from Visible to your network upgrade & get a new phone. I have a pixel 3. When I ordered the pixel 6a/ 7 / Orbic Myra, I cannot place the order, it errors "Uh oh.. There was a problem in your account. please contact administrator". Please help. Otherwise my service will be disconnected by AUG-1-2023.