Hello, I've finished in all level with 3 stars. I got all the Achievement except the last one "Gourmand". Anyone can help me please

I bought 50 hints then used them. I didn't get the achievement for 20 hints nor the one for 50 hints.

I haven't found a way to "undo". Is there a way to do this?

I didn't do the continents in order and finished Antarctica second. However, I only got the in game "Frozen Caramel" achievement for it and not the Steam achievement. After finishing all the other levels, I replayed the last Antarctica level and got the "Gourmand" all trophies collected achievement. How can I get the "Frozen Caramel" achievement without replaying all the levels?...

This was supposed to be out in january, it's so hard? geez.