I am so fed up with SE support, apparently no one can activate my SB code even though it's valid according to the CSRs I have spoken to using chat.

I keep getting this message after entering the code (this has been done in IE,Firefox and Chrome)

You cannot use this function.
Please contact the SQUARE ENIX Support Center for additional details.
Error Code: i2501


It is the correct code which has been checked by reps to be a valid code, so please no asking if it is the correct code or not.

Why is it not possible to have someone manually activate it on my account? It has been a week and I keep getting copy pasted responses.