I’ve selected 2 seats instead 1. This was a mistake. I need one license, and now I am offered to pay for 2 licenses. Can I reset 1 license or delete my subscription completely?

I do not want to cancel my subscription, I want to use and pay for 1 license.

My account is Google Account with the mail eugenesoz@gmail.com

I've tried to contact support at support@getfiddler.com but there were no reply.