First you need to choose any available service we have. After you click on "ENTER DETAILS" button, you should enter your Instagram Username and E-mail address. If you have a discount code, please click on "Do you have a discount code?".
When you clicked on "Do you have a discount code?", you will see one more area for entering your coupon code, then enter your coupon code and click on "Continue" button. That's it, you will pay much lesser!