Hello @Carlos31 ,
Thank you for contacting us.
Please note that an Upgrade key can only be used if you have a previous license key. In this case, you would not have been able to use the upgrade key.
As such, we have processed a refund for the purchase and it might take around 5-7 business days for it to be credited to your account.
Meanwhile, you may purchase a FULL license key - Standard (Permanent or Subscription, or Pro (Subscription only), depending on the features you require (Please see: https://kb.parallels.com/123296)
You may currently benefit from a 25% discount, ending in 4 days: https://www.parallels.com/products/desktop/buy/
Thank you!