Hello @GeeWindy, thank you for supporting us by subscribing to Windy Premium!
On which platform are you subscribed on – Google Play, App Store, or desktop/mobile browser (FastSpring)?
To access your premium features, follow steps in this manual: https://community.windy.com/topic/11832/what-to-do-if-you-can-t-access-your-windy-premium-features.
Note that the restoration process has to be followed on the device you originally made the purchase (in case of a mobile browser, it has to be in a mobile browser, not the app).
If the restoration fails, please, let me know in which step it failed and if there was an error message.