The position of CG is simple: if you have cheated, you will not receive the t-shirt. So, if you have pushed a default code in any language once you have reached the legend league just to get a t-shirt, you will not receive it.
This is the case for very few players (and this is not your case).
So yes, I've just checked and you will receive a t-shirt. We are currently sending you an email (it was an error you didn't received it)