How to delete/deactivate a dell australia account

After purchasing a laptop, I went to create a Dell account. I am from the US, but accidentally created an account through Dell Australia. I then went and created another account under the same email address through Dell US. I would like to delete/deactivate the account that I created through Dell Australia, but there is no obvious button to delete the account for Dell Australia like there is through Dell US. How can I delete the Dell Australia account on my own, or what is the best phone number to call? I've been bounced between multiple different phone numbers already.