If you can't talk to the station, how can you obtain their QFE?
If you'd failed the exam by failing that question, personally I would have 're-marked' that question......and would have asked you:
What are the dimensions of a MATZ?
Are you legally obliged to request MATZ penetration?
May you transit the ATZ of a military aerodrome without clearance if you receive no reply to your crossing request?
I'd be far more interested in making sure you knew the rules concerning a MATZ than answering a poorly-written exam question.