1. Every month you receive and email with your monthly bill.
Access to this email where you will find a link.
2. Click on the link to go to your Payment account (Monsum).
3. Go to your Monsum Customer Dashboard (right side of your company Name).
4. Click on Edit Data.
5. Over there you can change the payment method, billing address and VAT.
Send an email to firstname.lastname@example.org for further assistance.