As a merchant, you can change the Next Billing Date for your customer on the Ongoing Subscriptions app.
From Ongoing, click on Subscriptions
2. Click on the subscription you want to manage
3. Click Edit on Next Billing Date
4. Here you'll be able to change the Next Billing Date to a date in the future.
Click Save Changes
5. Once you're done, you should see your new Next Billing Date displaying.