Is the device you used for signing up previously used with another dev account? Is your payment method something that can be considered shady(i.e. single use or anonymous payment cards)?

If you call them, they will reset your status so you can try again but they will not tell you the reason. Try doing it on an Apple device that hasn't been used before with a dev account and make sure you are using a credit card on your name.

It's probably Apple trying to fight malicious developers but ending up blocking you.