One NZ complaint?

Do you have a dispute or a bad customer experience with One NZ? Report it through our website to maximize the chance of getting it resolved.

We help you write an effective complaint in minutes. Our AI models are trained on thousands of effective complaint letters. Then we push it through emails, social media, paper complaint letters and other tools at our disposal. And you are not alone: our helpful community is there for advice.

The One NZ customer service number for mobile customers in New Zealand is 0800 800 021; broadband customers have their own line, listed on the One NZ contact page. One NZ also helps customers by messaging in the One NZ app and on WhatsApp, and in its stores, and complaints can be made through the complaints page on its website, linked in the contact details at the top of this page. Have your account number or mobile number, the bill or service in question and any earlier reference numbers ready.

Charge or fault you want put right? Report it here as well and we push it out to One NZ by email, social media and printed letters.

To escalate a complaint with One NZ, ask for it to be registered as a formal complaint and note the reference number, then set out in writing what is still wrong, the dates and references of earlier contacts, and the outcome you want, such as a corrected bill, a credit or a repair. One NZ also has an Executive Customer Care team that works on behalf of its executives for customers who need extra support; its email address is the complaints email in the contact details at the top of this page. One NZ's registered office is in Auckland.

Complaint that needs senior eyes on it? Take it through our complaint process: our trained AI opens a case for you and keeps coaching you on what to reply and when to push again.

To cancel a One NZ mobile or broadband plan, contact One NZ by phone, app messaging or in store, say which service you want to end and from what date, and ask for written confirmation of the cancellation and of your final bill. If you are moving to another provider, the new provider can often arrange the switch and keep your mobile number, but confirm with One NZ that the old account is closed so billing stops.

Before you cancel, check your plan terms for any early termination charge on a fixed-term plan and whether a phone bought on a payment plan still has instalments owing. Keep the confirmation and the final bill until the account shows nothing owing.

Yes: Telecommunications Dispute Resolution (TDR) deals with complaints between customers and their telecommunications providers in New Zealand, and One NZ is a member of the TDR scheme. TDR generally expects One NZ to have had the chance to put things right first, so keep a record of every call, message, store visit and reference.

Billing or fault dispute with One NZ? We help you write the complaint in minutes, laying out each charge, date and reference so the dispute is easy to follow.

Not if it contains a link. One NZ says it never sends failed-payment messages with a website link, and that it contacts you about a missed payment with the amount owing and your billing account details. Scam texts have used web addresses containing 'onenz' that are not its real site.

Nothing has been reported about One NZ here yet. Our research shows what typically goes wrong at large New Zealand telcos: bills that do not match the plan, charges after cancelling or switching, broadband faults and slow speeds, payment plans on phones, roaming charges after travel, and number transfers that fail.

Spotted one of those on your One NZ bill? Report it here first: your case opens the record for the next One NZ customer with the same charge.

Your complaint gets its own public page on Complain.biz and we get to work: we bring it to the attention of One NZ through emails, social media, paper complaint letters and other tools at our disposal.

And we stay with it after you file. Our trained AI opens a case file for you and keeps coaching: what to reply, when to push again, and how to escalate if nothing happens.

Yes. We have an active community of consumers, and complaints here are public: people who ran into the same problem with One NZ can give you advice or back you up with their own story. A complaint with a community behind it is much harder to overlook.