Pay error?

Huhu. First nice game. I buy like the exp bonus. Here now is what happens. Bought in 2000 kills the exp bonus. 2 times 1000. After one level up from 50 to 51, the game crashed. And after that had again Level 50 and only 1000 kills left. The PlayStore mail is the same as here in the forum. Can you help me because maybe? The text comes from googel since I live in Germany and no English can.

Hi! I will get that fixed for you. Please email

If you have already emailed that address I will get you taken care of as I work through the emails.