First you will have to cancel the renewal of your current subscription.To do this,login to your dashboard and under "My subscription" click on "Cancel" for that specific subscription (or you can login to your Paypal account and cancel your subscription under Pre-Approved payments).
Then you can go and create your new subscription when your cancelled one expires.

If you don't want to wait until expiration,contact us to refund you the remaining days of your subscription and remove your cancelled profile from your dashboard.Afterwards you can create your new subscription.