Need to cancel accounts

I am moving to New Zealand in January, and have been trying to move my accounts from contract to pre-paid for over a month now. I have phoned in twice (REF ***) and sent self-service queries, twice, (REF 139 500 319), and I'm still unable to either cancel or move the accounts to pre-paid. I can't even get feedback. No ons is getting back to me. With the last call, the lady confirmed that there is nothing loaded on the system. Your service is unacceptable and pathetic to say the least.