You can make changes to your billing information by clicking on the Manage Billing button on your Settings page:
Here you can:
Add, remove, or replace a payment method
Cancel an OrbitKit Plus subscription (service continues through the end of your billing cycle, you don't need to time your cancellation)
Start an OrbitKit Plus subscription
Change the tier of an existing OrbitKit Plus subscription (the monthly charge will be prorated)
For any other billing questions, just reach out to support in the in-app chat.