For all official invoices, you need to contact either Paddle or FastSpring, whichever of our two official retailers charged your card/PayPal account.
You can get in touch with either of these companies via their web sites:
Paddle - appears on card statement as PADDLE.NET* SITEARROW:
You can request a full invoice history to your email here: https://sitearrow.com/paddleinvoice.php
FastSpring - appears on card statement as FS* SITEARROW: