Bad client service

KFC is a 24 hour drive thru. When I came there at 06:30 the entire KFC was closes even though there is 24hour drive thru stickers everywhere. Then I asked someone inside why they are closes and she resonded in a very rude manner just saying they are only opening at 7am, then I asked her how can they be closes if it is a 24 hour drive thru, and the answer again was "open at 7am" and turned around and walked away.