It can be a bit confusing if you're new to the process. The Domain Buy service is something you use to have GoDaddy reach out to a domain owner to see if they want to sell it.
And yes, you can get a refund. I believe there are some stipulations to it, but if you haven't actually used the service then you should be able to get your money back. Just call phone support and they should be able to help you with a quickness.
I am a GoDaddy End User - Just Like You * Please note that I offer free advice on this forum. I DO NOT answer private messages. Please ask your question in the proper forum so the answer can assist EVERYONE in the community and not just you. Thanks! *
Once your issue is resolved, please be sure to come back and click accept for the solution