Thank you for reaching out to us through the Community! If you are under the regular Email plan you will click on the right top tab of the Constant Contact screen. The tab will give you drop down options and you will click on the "Plans and Pricing" option. Once you get to that interface, you will notice a blue banner to the top of the screen where you can do a one-time campaign. If you are in the Email Plus plan, you can just simply create the Survey with no extra charge!
Click here for information on how to create a Survey!