File a complaint with corporate on their website.
My only advice would be to ask why they're closed and not assume that it's for some unwarranted reason... I'm almost positive if you would have asked they would have given you an answer.. If it says they're closed there's obviously a reason... No one says they're closed for no reason...some people are just spoiled and want the world handed to them and if they don't get it they complain...Now I'm not suggesting you're one of those people but if if you want to know why they closed you should have asked... It's actually odd because I've been there many times while they were closing and the store clerks say-so over the intercom and actually usually give customers a 5 minute grace period... I've never seen them close before 10 except when the roof collapsed and part of the store was flooded so they were forced to close for 3 days I know because I go there every day...
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