Disconnect my website from previous 10Web Booster Dashboard

My website is connected to 10Web Booster, but for some reasons I can’t access the old Dashboard as I don’t have any credentials neither I have the previous google account which is associated with that Dashboard. Now I need to connect this website to a new dashboard where I can manage and control my optimization settings but whenever I try to connect my site with new dashboard, it gives me error of “site already connected”. Kindly help me solve this error I need to disconnect my site from previous/lost dashboard and connect to a new one.