Skip to Search Skip to Content Skip to Footer

Order by phone: 0800 033 8006

Complaints form

Something’s gone wrong – your form hasn’t been sent. Please check the information you’ve entered and try again.  

Please complete the details below.

    We’re sorry you’ve not had the best experience. If you fill out our form, we’ll do everything we can to make things right.

    When filling out the form, use the same details as those on your Three account. And when you’re done, please bear with us. We’ll be in touch as soon as possible. 

    We deal with most complaints within seven working days, but it can sometimes take longer. We’ll contact you by phone - if we can’t get hold of you, we’ll send an email. 

    And if the issue can’t wait, it might be quicker to contact us via Live Chat or give us a call.

    Your details

    • Mr
    • Miss
    • Mrs
    • Ms
    • Mx
    • Dr
    • Professor
    • Reverend
    • Prefer not to say

    Date of birth

    Please use the DD/MM/YYYY format

    Your address

    About your plan and account

    • Pay Monthly
    • Pay As You Go
    • Mobile Broadband
    • Home Broadband
    • Business

    The mobile number you're complaining about.

    The Mobile or Home Broadband account number you're complaining about.

    e.g. Voucher, App, Call Centre, IVR, Web top-up

    Please enter the amount in £XX.XX format

    Please choose a valid answer.
    Please choose a valid answer.
    Please choose a valid answer.
    • Personal Account
      • Billing
        • customer_complaints@contact.three.co.uk
      • Network issues
        • customer_complaints@contact.three.co.uk
      • Joining Three
        • customer_complaints@contact.three.co.uk
      • Renewing with Three
        • customer_complaints@contact.three.co.uk
      • Leaving Three
        • customer_complaints@contact.three.co.uk
      • Device loan agreement
        • customer_complaints@contact.three.co.uk
      • Delivery issues
        • tcustomer_complaints@contact.three.co.uk
      • Payments
        • customer_complaints@contact.three.co.uk
      • Deposits and refunds
        • customer_complaints@contact.three.co.uk
      • Device faults and repairs
        • customer_complaints@contact.three.co.uk
      • Pay As You Go
        • customer_complaints@contact.three.co.uk
      • Accessibility and vulnerability
        • customer_complaints@contact.three.co.uk
      • Insurance
        • customer_complaints@contact.three.co.uk
      • Fraud
        • customer_complaints@contact.three.co.uk
      • Data security
        • customer_complaints@contact.three.co.uk
      • Service from staff member
        • customer_complaints@contact.three.co.uk
    • Business Account

    If you’ve selected Network issue, enter the following details (if not, skip to Summary of your complaint).

    Please specify make and model eg Samsung Galaxy s25 Plus

    • Indoors
    • Outdoors
    • One-off
    • Intermittent
    • Constant

    Summary of your complaint

    How can we help?

    If there’s something specific you think we can do, let us know here. Please don’t share any sensitive or personal data, such as bank details.

    Getting in touch with you

    • Phone
    • Email
    • Morning (08:00-12:00)
    • Afternoon (12:00-16:00)
    • Evening (16:00-20:00)

    This should be the contact number registered on your account.

    We want to make sure you have the support you need. Please let us know if any of the following apply to you: