How can I delete my Apple ID and Icloud account?

You can also try Apple ID Support, there is a contact link.

Apple ID Support

Apple ID Support (2)

Apple Support by e-mail or chat Select your device, Battery, Power and Charging, then Power adapter not working to get a chat option. If you need to talk to them, ask them if they will do a Skype or FaceTime with you.

Apple Support using Twitter

Only iTunes Support can potentially delete an account (which would obviously also delete its content), if you want to try asking them : https://www.apple.com/emea/support/itunes/contact.html