Error Code: i2501 - Level Boost purchase

[ToxicStyle]

As the title says:

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

New player, just trying to buy a level boost.

However, I receive this error no matter what the item I select to be purchased is.

I have emailed support and awaiting a response. Not sure if this is an error on my end. It always happens when I select Visa or Mastercard as payment, and I also get this error when attempting to add Crysta to my account.

Any help would be appreciated.