This can have various causes: Please check these step-by-step:
1. Did you pay by bank transfer and transferred the correct amount and stated the correct reason?
I didn't use the right reason -> check what to do here: the transfer was made with the wrong reason
2. Did you receive an email about your purchase?
Yes, but my product cannot be found in the account
-> Check which email address the email was sent to and whether you are logged in with this email address. You can check this under "Settings" / "Profile."
If you have multiple email addresses and are logged into a different account, please log out and log in with the purchase email address. If you do not yet have a password for this, please set a password using the link in the purchase confirmation email from the seller.
If you would like to merge both buyer accounts, you will find instructions here -> Merging buyer accounts
No, I did not receive an email
-> check your spam or junk folder directly with your email provider
Can you find the email there?
No, the email is not in the spam or promotional folder either
-> please contact the seller so that he can check which email address you used to order and what the status of your payment is. He can then tell you more about it.