How to get Purchased customer data

Hello Mate,
I am very happy to use this portal.
Only one concern which I can see is : How to get customer data or info who purchased my product. Because right now I can’t update him or contact him for feedback or any issue support.

Is there any way to check this details ?

They’ll contact you if they need support, they’ll get an automated message if you update your item, and they’ll leave feedback if they want to!