Great fun but... – Find the Difference 150 levels Review

I just purchased 'no ads' + 10 hints and nothing changed. I am still seeing annoying ads and did not receive the hints. This is frustrating and the reason for not giving the game five stars. I do enjoy the game and would agree with others that the pictures are small and could be larger for sure. I don't know who to contact to fix my issue above. Please let me know. Thanks.
Review by rdaleg on Find the Difference 150 levels.