Subscription Service not working?


It would be immediately applied if it was successful. Based on your post in a different topic, you're on the app, correct?
If that's correct, purchasing on the app applies to the email associated with the app store. If that doesn't match the email associated with your account here, it wouldn't apply to this account.
You mentioned you contact Support in that other topic as well. The support tool should behave provided an estimate on when you should be contacted.