Adobe admin console - licences attributions

I use one email as an admin (to buy and give access to the licences to my team).

In last December (2018) i canceled two Premiere licence as we had no editing project for 4 months. Last week, i bought two new Premiere licence and gave access to the same user (work station A and work station B).

Since then, I'm totally unable to use these two licence on any computer. I was able to use it once last Friday on one station and lost the access since then.

I even tried to give access to a total new team member (email that was never granted access to a Adobe service)

What i'm missing is that i have an other licence (Full creative app) that is working on any station.

All the apps are up to date, using OS 10.13.6 (High sierra).

Adobe is only telling me that they escalated the case to a senior representative. I have staff that come to work and are unable to use their station....

Please help.