Apple Developer subscription invoice - solve this already - we need to find it easy and download it

No matter what I do, no matter which link or advice I follow, I can't end up at the invoice of my paid subscription. Not on screen, nor for download. Just as if it does not exist.

I sign in, I go to Orders, I enter the order number (e.g. AEM079****), I enter the SAME email I received the confirmation email for the purchase. At the end it says either "there was a problem... blah-blah, try again" or something similar to "The order number entered is already linked to an Apple ID.". Well, that IS ME, the same email.

I am really sick of this already, every time my accountant asks me for the invoice, I go to Apple hoping "let me find it this time". Nope.

Can Apple solve this years-old-issue?

Please do NOT close this question until I (we) all get an advice or answer which REALLY WORKS! Thank you.