Changing Uberent key to Steam key

How to convert my uberent key to steam key?
I went to my My Keys page and clicked on the key but I don't see any convert your key/button to steam anywhere.
Please help me someone

Just enter your code into your Steam client as “Activate a Product on Steam”.
Please make sure your Steam account is linked to your UberNet account by going here.

For Uber Store purchases, please contact Support to receive a Steam code.

FAQ, point 3:
http://www.uberent.com/pa/faq/

Although there is little to no reason to do so...

Tried everything but it says invalid product code

So where did you get the key itself? One displayed on "MyKeys" page only valid for Uber store and in case to get Steam key you need to contact support.

@sakif Unfortunately, we were only able to get the Steam conversion to work for Kickstarter Backers. To request a Steam key, please contact Support. But please note that Support is very busy with several requests and it may take some time before your request is answered.