To change the payment details for the subscription of your unit, you need to log in to the Cloud service (https://cloud.valomotion.com).
For more detailed instruction on the use of the Cloud service, see here.
After logging in to the Cloud service, follow the instructions below:
1. Locate the subscription section in the unit page and select "Edit"
2. From the subscription page select "Details"
3. From subscription details page select "Edit"
4. In the edit subscription page select a payment method or add a new one.
For more information on subscribing your unit, please see the article How do I pay the subscription for my unit?