Login to Home Page - Buddy Auth Portal and you should be able to see your key(s). If you don't have a buddyauth account, proceed to registering with the email you made your payment with.
Please go to Home Page - Buddy Auth Portal and register with the account that you used when you purchased the bot and your key should be there. If not, please send an email to support@thebuddyforum.com with your name, email, and payment information so that we can get the issue resolved.