Amazon Refund Service Question

Hello,i have a question about the process for anyone who has manage to do it before. After you chat with amazon and the rep lets you know they are going to request a refund for you. How long does it usually take for them to send you the confirmation email? Is it immediately or does it usually take long?

Confirmation email should be immediate if they said on the phone or they said on livechat that they sent you a confirmation email and that you should see it in your email account, if they said it and it didn't show up, or they just didn't bother with it at all, you will get a confirmation once you get the refund - or atleast you should