If you paid for Premium but the app still shows ads or locked features, the app is not seeing your subscription. Your subscription belongs to the account you were signed in to when you paid. These steps fix it in most cases.
The app checks your subscription every time it starts.
Then open the app again.
Use the same Apple Account or Google account you paid with.
A subscription that was cancelled or has expired no longer unlocks Premium. Check it in your Apple or Google account. See How to cancel a subscription or get a refund for where to find it.
If you joined the account of someone who has Premium, you get Premium through them and don't need to pay. Make sure you are signed in, and ask them to check that their subscription is active and that you are still on their account.
Open Help in the app and tap Contact us. Tell us the email you are signed in with, and whether you paid with Apple or Google.