I have no ability to purchase extended licenses

There is no other tab.  No other options than just "license" and it is a complete gamble as to what type of license I seem to get. I have licensed some images that turn out to be extended, some that turn out to be enhanced, some that turn out to be standard. 

I repeat there is no other tab or choices for any type of license selection. On hundreds of different images, years of using adobe I have never seen that choice.   If I click "License" it automatically licenses the image without me needing to click accept or anything so I have wasted credit's simply clicking license hoping I would be prompted with licensing options.

Research suggests I need an "enterprise account" yet there are lots of people who have been able to purchase extended licenses without such account. I also have no available options for upgrading or changing my plan, nor can I find any link that directs me towards a page that offers the purchasing of an enterprise or business account.

I need the extended licenses to make use of adobe stock. Hoping someone can tell me what I need to change.