RDS Cal issue

Looking for some advise on how to resolve a cal issue with Server 2012 R2 RDS licensing 

i have activated the 5 Device RDS cals and when i look at the licensing server it says 5 licenses are installed but there are 0 available and 0 issued

anyone have any idea why the cals aren't available?

i have spoken to the activation team at microsoft and they say that the cals have been successfully activated.

i have checked and the RDS gateway is set for per device

any help greatly appreciated  

Chris