If you wish to upgrade, we will simply credit you pro rata for your unused subscription.
So say you had purchased an OS Premium for £24 and now wanted OS Premium Plus for £32.
If you purchased the initial subscription 6 months ago we would credit you £12 towards your new purchase.
Two way to do this:
1. If you want to get straight on with it, simply purchase the new subscription which will be placed on your account as soon as the purchase is complete - you can then start using it immediately. Then let support know on email@example.com and we will refund an amount due to the initial subscription.
2. Drop an email to firstname.lastname@example.org and we will work out a personal discount code for our shop to take the older subscription remaining time into account.