How to ask the metric not to attribute income to payment systems, and indicate its referrer / source?

Question

Yandex.Metrica

Problem : The metric "attributes" revenue to payment systems.



How the purchase on the site works:
1. The user has selected a product
2. Payment is initiated
3. (!) The user is redirected to the payment site where he makes the payment
4. (!) The user is redirected to the "Pick up the product"

page after payment On the "Pick up the product" page " - the purchase event is dispatched . Apparently, Metrica reads the Referrer, and seeing the payment system there, it is she who is credited with the "Transition".

Question:
How can this situation be resolved?
- Is it possible to record the referrer in cookies, or another place,