UNDO email & contact form
UNDO doesn't publish a direct customer email address. Use the contact form or online chat instead.
UNDO customer service phone number, opening hours and contact details
By Maaike Zahn | Last updated on 13 March 2025
UNDO has no traditional phone-based customer service — all support runs through My UNDO. On this page you'll find all the contact options for UNDO.
0 phone numbers
How do you contact UNDO?
Four channels, one goal: get your question answered as fast as possible. Pick whatever best matches your situation.
No phone-based service
UNDO has no traditional phone line. All support runs through the online channels below.
Online customer area
My UNDO — check invoices, manage your subscription and chat with customer service.
Open customer areaEmail or social media
Contact form or message via Facebook, X or Instagram.
See channelsFile a complaint
Try UNDO first, then the Telecommunications Ombudsman if you can't reach a resolution.
See procedure
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My UNDO — the online customer area
In My UNDO you can handle many things yourself — often faster than by phone. Check invoices, change your subscription and get notifications about outages or new options.
Reach UNDO via email or social media
Prefer not to call? You can also reach UNDO digitally — via the online customer area or via the official social media channels. Both options are listed below, with the typical response time and the right channel for your question.
Procedures with UNDO
Moving, becoming a customer or cancelling — click on each card to see the full procedure.
Become a UNDO customer
Subscribe to a new UNDO plan.
- Via the UNDO website — subscribe yourself online.
Notify UNDO of your move
Change your address with UNDO — mobile or pack.
Your address change makes sure invoices, post and any visiting engineers reach you at the right address. The approach depends on the type of subscription.
For a mobile-only plan it's enough to update your billing address in My UNDO — your number and plan stay the same.
Cancel or switch from UNDO
Easy Switch, number portability or via CallMePower.
- Via CallMePower — cancel and subscribe to a new plan in one call.
- Easy Switch when switching internet or TV providers — no interruption to your connection.
- Number portability when switching mobile plans — keep your phone number.
- Via My UNDO — manage your cancellation yourself.
Filing a complaint with UNDO
Stuck with an unresolved problem? Follow these three steps — the Telecommunications Ombudsman is your last resort.
1
Contact customer service
Describe the problem to UNDO customer service, mention earlier contact attempts and keep the reference number of your case.
2
File a formal complaint
No resolution? Ask for written confirmation in every interaction (by email or in My UNDO) so you have a paper trail.
3
Ombudsman
Escalate to the Telecommunications Ombudsman — an independent body that mediates between you and the operator.
Frequently asked questions about UNDO customer service
Can't find your answer below? Call our Belgian advisor on 02 588 25 47 — free and pressure-free.
UNDO is a climate-neutral online provider on the Orange network and has no telephone customer service. All support runs through email and the customer portal. For advice, call CallMePower on 02 588 25 47.
Via your account on undo.network.
No, UNDO operates entirely online.
UNDO invests the surplus of each subscription in projects that remove CO2 from the atmosphere — telecom with a climate-positive impact.
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