This option is available on Tier 3 plan.
How to disable "Pay-as-you-go CDN Transfer Option"
1. Login to Dashboard
2. Click Site you want to add the option
3. Check the current bandwidth
Navigate to Current plan section under [Information] menu.
4. Make sure "Total usage (GB)" is less than 1000GB.
If still over 1000GB, you cannot disable this feature.
5. Conform auto charge is enabled
Navigate to [Subscription] menu and scroll down to "Pay-as-you-go CDN Transfer Option" section.
6. Click toggle switch to disable.
7. Confirm "Pay-as-you-go CDN Transfer Option" is disabled