Seems you aren't going about it correctly .
Step 1 log into your Marketplace account and find the extension you want to update. Click on the GET Help button
Step 2 That will take you to the Product Support Page click on the Extend Support button.
Step 3 That will open the extension page and you will see the Extended Support for 12 month and the support price.
Step 4 continue and it will add that item to your cart.
Step 1 log into your Marketplace account and find the extension you want to update. Click on the GET Help button
Step 2 That will take you to the Product Support Page click on the Extend Support button.
Step 3 That will open the extension page and you will see the Extended Support for 12 month and the support price.
Step 4 continue and it will add that item to your cart.

