How do I get the Minecoins included?

I recently bought the Minecraft Windows 10 Starter Package, which should contain 700 Minecoins. Now the question arises how do I get this? I signed into Minecraft with the Microsoft account that I used to buy it, but the account balance is 0 Minecoins?

If you have the digital version you have received an email with a code. But if you have the physical version there should be a sheet of code in the manual compartment

I received ONE code that I used to download the game and package

That goes without saying