Stopped working

I paid the $3.99 for the full version, my son loved it. After a few weeks it was back to limited access with popups and ads. I tried deleting the app and reloading it with no success. Im not sure how else to fix it. Very disappointing since I paid $4 for it. I want my money back or for the app to work properly. Very frustrating!

Truck mom about My First Vehicle Universe