To add a valid payment method for your subscription, follow the steps below:

1. Login to Zenduty as the account owner
2. In the top right of the Zenduty dashboard, click on the dropdown under your name and click on "Account"
3. Navigate to Payment methods
4. Enter the details for a valid card and click on Save
5. Click on the Plan tab and choose a plan. Click on Save to save your active subscription plan