How to redeem your voucher(s) if you already have the subscription?
If you were given a new voucher to upgrade your subscription and you have your account set up already, you can use the upgrade page:
Step 1: the billing dashboard: from the left menu, click billing-> dashboard, then click Change subscription
Step 2: Enter your voucher(s) in the voucher input - please don’t forget to press enter after adding each code:
Step 3: click next and follow the wizard until you check out!