http://hy-am.facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd.onion/business/help/268196136699959?helpref=uf_permalink
It’s often labeled as CVV, CVC, CSC, CVV2 or CVC2. Confirm that your payment method is connected to the phone number where you may be expecting an OTP, and you have access to the phone. Confirm that the payment method is not already added to multiple ad accounts.