Any Godaddy DNS / Firewall Admins here?

Hello all, Are there any Godaddy DNS / Firewall Admins here? We are getting no response to our DNS servers 123.108.200.180, 123.108.201.51 from Godaddy DNS servers randomly for their DNS hosted domains. We use root.hints that are updated. We have tried with powerdns recursor, unbound and also named with same result. We have checked we are not openrelay/We don't respond to IPs outside our customer pools. Can anyone help urgently. Regards DP -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus