The basic problem is that the IGN half-mill charts only go to 5000 feet MSL/2000 AGL (whichever is higher).
So if you're at FL85 you're off the top of your chart.
Without knowing where you were, it's hard to say what was above you at FL85.
There is quite a bit of Class D spotted about the Paris area (outside the Class A). If the base of that is over 5000 feet, your chart wouldn't show it. The controllers might clear you into it up to FL85 but not want you any higher. End of argument!
I had a browse of the airways charts for Geneva to Paris to UK and couldn't see any airways below FL60 - not that I can be sure I didn't miss any.
BUT the IGN chart legend tells you that airways whose lower limit is below FL65 are not shown. Being Class E, they aren't quite as restrictive as UK airways!
So the charts "do what it says on the tin".