No download link received after successful payment

I paid for the purchase by scanning the QR code, and there was no problem before. But just now, I found that the payment software showed that the payment was successful, but I didn't receive the download link, and there were still goods in the shopping cart. When I paid again, it showed that the payment failed.

Will this money be refunded? How can I buy it again?

Just now, I tried to pay again, so I can buy again. But I didn't receive the download link before, but the payment was successful. Will the money be safely returned to my account? Have there been any friends who have had similar situations?

I just paid again. I got the download link, but the money I paid for the first time has not been returned. I suggest that this problem must be checked and repaired

I need help, thank you all