You can obtain a receipt of payment on your Qobuz account.
To do so, please
Log on to www.qobuz.com
Click on your name at the top right of the screen
Click on "My profile".
Go to the "My payment receipts" tab
You will then be able to download your various receipts.
Please note that the Qobuz service is intended for private individuals, the payment receipt will be in your name.