Keep in mind that the ad-free version is a separate app from the version with ads, that is, to buy the ad-free version, you need to download Trivia Crack (No Ads) from the store in your device.
For this reason, it is possible that, despite having downloaded the ad-free version, you are still playing the version with ads. This is why, once you have downloaded the ad-free version, we recommend you delete the version with ads to avoid confusion.
Also remember that the purchase of the ad-free version is stored in the PlayStore/AppStore account used on the mobile device. If you use another device and do not have the same AppStore/PlayStore account, you will not be able to recover the ad-free version.
Moreover, in the event that you have purchased the ad-free version of the game and are still viewing them, we suggest you to visit the article: I bought the ad-free version, why do I keep seeing ads?