The purchases on your account were completed when you had “payouts” mode enabled on your account. You will need to provide all information necessary to request a payout to transfer those funds.
You can lean more about payouts and direct payments here: https://itch.io/docs/creators/payments#payment-modes
In the future, if you have a generic question about how the platform works please just ask it directly instead of making a topic asking if you can contact itch.io.
Thanks