How to complain to Three
How to complain to Three about billing, payment support or account handling using its current official complaint routes.
Three accepts complaints through live chat, phone, online form and post. Keep the account number, dates, disputed charges and any payment-support agreement so the complaint can be matched to the correct Airtime or device-plan account.
Use the formal complaint route
Three publishes a dedicated complaints process and Customer Complaints Code rather than requiring customers to rely on general support conversations.
Separate billing and credit issues
If the complaint involves an incorrect arrears balance or credit-file reporting, identify the specific account and payment dates you dispute.