I am facing issues with games I bought from the Minecraft store.

I know my message is a little long but I hope you read it. About two months ago I bought two worlds to play in (mines) and (pizza delivery simulator) they both worked perfectly fine and after about a week or two whenever I play them either they freeze or the game crashes, so I uninstalled it and now after the nether update I reinstalled the game on my iPad ,because I have always played pocket edition, and when I play the pizza simulator and collect money I exchange the money for a stack of bux but when I put the money in the slot in the atm it disappears and returns to my inventory and I just can't play the game,that was for the pizza delivery simulator. But for the mines I can play it but when I get into the mining car and get to the mines I press the blocks to mine but whenever I press the blocks it doesn't mine. Hope you can fix my problem and thank you.