yes i called them. of course their hotline was not "hot" at that moment, but i did find my way to the person in charge.
it seems that this station should only lock your adapter when activated by the rfid chip. but till the end of year it is free and no chips so it should not lock at any time. however it did. they tryied to reset it remotely. no success. so my adapter is there and i m here untill the technician arrives at the station...