If you have cubits as an in-game item, what you will have to do to transfer them to your balance (
/cubits balance) is creating a support ticket on the forums
here. After that, you´ll have to wait until you get an answer from Staff.
(To spend those cubits in the store, you must have at least
2 cubits)
Please let me know if you were able to do it, if not, reply to this message or start a conversation with me
here.
¡Hope you have a good day!