I'm experiencing an issue where the game doesn't progress even after watching ads.

When I was playing another game a lot, I watched so many ads that there were times when ads wouldn't show up at all, and I couldn't get the ad benefits. So lately, I've been hardly watching ads even when using other apps or games... I was saving them for revives in this game.. But since yesterday, even when I watch ads for bombs or time-outs, the game doesn't proceed even though the ad has clearly ended ㅠ.ㅜ If I keep spending 800 coins, I'll eventually run out of coins... Is this a pay-to-win tactic..? Anyway, I was hoping to reach the final hidden stage, but I might have to delete the game if I can't continue ㅠ