Purchased upgrade to 12 without realizing cannot upgrade from 5. What now?

I just purchased an upgrade to 12 without realizing it can only be used when upgrading from 10 or 11. How do I go about paying the difference obtain a full license?
Thanks for your help!

***Edit: I have just read in other threads that those who made the same mistake were provided with a link to allow them to pay the difference. Can you provide me with that link?
Thanks so much.....

 

Hi @jenniferk
We have requested for a few information in private message. Please check and respond,we would be happy to help you out!

 

I am having the same issue please.

 

Hi jenniferk,
We have initiated refund for your purchase and request you to buy Parallels Desktop full version.

 

May I please request the same? I had Parallels 9 but purchased the upgrade by mistake.

 

Hi JosephG3,
We have initiated the refund for the upgrade purchase and sent an email confirmation. Use the link in the email to buy Parallels Desktop 12.

 

I have the same issue and require a refund please.

 

Hello NadimS, looks like the refund has already been processed.
Please get back to us if you have any further questions.