something went wrong. check the instructions that came with your code

I bought a Lego Harry Potter Game as a gift to my son but when he tried to redeem the code on Xbox he got:

something went wrong. check the instructions that came with your code

I tried too many times on his account or even mine but I got the same message.

I followed the instructions from a thread here that suggested

URL:https://account.xbox.com/PaymentAndBilling/RedeemCode?doRedeem=0&token=#####-#####-#####-#####-#####, replacing the #s with the code.

But I got:

Something went wrong and we can't sign you in right now. Please try again later.

The Microsoft account login server has detected too many repeated authentication attempts. Please wait a moment and try again.

Any other solutions to fix this or tell me how to refund it please.

:)