Something broken, confusing, or missing? Let us know! It'll be a real human on the other end, so help us out and be as specific as you can.
The information below would be most helpful to us:
Open the ad-free screen in the app and tap Restore Purchases. A subscription covers every device signed in to the same Apple Account, but a fresh install has to be told to go and look for it.
If it still doesn't work, send us an email saying which Apple Account made the purchase and we'll look into it.
Subscriptions are billed by Apple, so they must be changed and cancelled through Apple - either from the subscriptions screen in the app, or at apps.apple.com/account/subscriptions. Sorry, we can't do it ourselves.