To upgrade your Amazon in-app purchase, please use the following steps:

• Go to Settings in the Sportsnet app
• Select Manage Subscription 
• Select Upgrade to Sportsnet+ PREMIUM
• Accept the Amazon Purchase Terms

You will be charged the full price of an Sportsnet+ PREMIUM subscription immediately and Amazon will process a prorated refund for your previous subscription. On your next bill date, you will be charged for a full month of Sportsnet++.