You can enable/disable automatic renewal by following steps on your control panel.

1. Log in to your control panel.
2. Click "Account"→"Subscriptions"  
    You can see your subscriptions.
3. Choose your subscription

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4. You can click DISABLE/ENABLE AUTOMATIC RENEWAL

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You can enable/disable automatic payment by following steps on your control panel.

1. Log in to your control panel.
2. Click "Account"→"Payment Methods"
3. Click "Actions"
4. You can Enable/Disable Automatic Payment