@MojangStatus @MojangSupport trying to help my son w/something minecraft on his new pc-need to sign up for mojang account but already redeemed game on W10 pc, wants me to buy again?! Cant redeem game code twice, how do I add game to mojang account

Hey @Mojang 4 days now tweeting back & forth w/@MojangSupport & NOTHING has happened. They just keep asking the same question & I keep answering same thing. No response via emails sent 4 days ago