Hi Anand,
After paying in paypal, you should be redirected back to our site to fill the configuration form and collect the code with your new apikey. Also the apikey would be emailed to you after successful submission of the form.
If you missed that, could you please email us at
que...@civicuk.com your paypal receipt or the email with which you paid in paypal, and also the email you want to be used with your single domain license, a desired password for our configuration pages and the domain you want to use cookie control on?
Kind regards,
Gerasimos