Unfair play for money paid

I am in the very upper levels , actually they're out of levels and I keep getting these mini chests with very little reward. There's new aquariums  pending but you wait for months, in the meen time I've spent hundreds and if I want to keep playing , spend more. I have over a million coins but they do me no good without the aquariums being released. So you're thinking just quit the Game, but it's a matter of principal, to have over a million coins you know how much I've spent. In the beginning no problem getting coins for feeding, watching videos etc, now they've just gotten super cheap. Bottom line if they want to keep making money treat loyal and persistent customers happy. I can't seem to get them to hear me so this is my last shot.