Minecraft PE license bug

 
Hello mojang (Sorry in advande for my mistackes, i'm french, and I translate with Google traduction) 
I'm really disappointed with Minecraft PE and its glitches of all kinds. But generally, i take like even fun to play. But what happened to me is really too much abuse !
 
I open Minecraft PE, and the game says that I do no have the license of I don't know what because the game think that I didn't buy the game legally. I want to clarify, I have paid the game four or five years ago when it was still priced at five euros and a few.
 
At first, I would think it was the fault of the "games" file that the game created and that I had placed on my SD card to not lose my worlds in case of death of my phone. Yes because I noticed that my worlds couldn't be seen by the game if this file is not in the internal storage of my phone. So I moved the file in the internal storage,  but the game still does not want to let me play.
 
So I went on Google play and I uninstalled the game thinking that I would solve the problem...
 
And the game has become paid again...
 
And what's more, you've increased the price to seven euros...
 
I don't know if this message will, be sent directly to Mojang, but if so, I would like to tell you that is really unpleasant on your part, and that your anti-piracy system is really very foolish !
 
I hope that I will receive an answer from you and, why not, a solution so that I can reply to this superb game that is Minecraft PE, 
 
Sincerely, BUP