What do you do when u ask to provide a phone at least 18 or fewer digit web creating payment method

Am trying to set payment method, I fill all d information, until I get to country and it was name of states showing I add my state, then the place where phone number is require I add my phone number and press nest and they say I should complete the information, and message was written in red saying the phone number must be at least 18 or fewer digits, the also the state abbreviation is not valid and must b in 3 letters