Cannot get my registration code

AVG Protection
2

Hello Kevin,
We apologize for the inconvenience. To assist you better, we suggest you to send us the sales number you have purchased, so that we can check the same for you. I will send you an email. Please reply to that email with the sales number.
Thank you.

3

Hello Kevin,
We apologize for the inconvenience. To assist you better, we suggest you to send us the sales number you have purchased, so that we can check the same for you. I will send you an email. Please reply to that email with the sales number.
Thank you.

1

I Just bought the AVG Antivirus from a CNA store here and when I went to get my registration code it said 
Your AVG Sales Number has already been registered in our database
This is the first time i have used it and i have no idea of how to fix this . Please help