When purchasing Minecoins, Minecraft gives the error code 0x80070490. It does not give the Minecoins on the game's side, however it does charge the debit card and the purchase is present in the purchase history of mojang and Microsoft. After many sessions with Microsoft, it seems like the transaction itself was not the problem, but the game itself. There is no other forum or issue that talks about this, and googling the error message leads nowhere. I have been on the tech support lines of Microsoft and Mojang for the last month on this issue and it seems nothing is being done, or even taking the time to look into it.