Your imagination is running wild on the basis of one person’s comment on an Internet forum. You have no basis to conclude that and only one of how many reviews have even inferred such a thing?One of the reviewers on Google said he was made to stay in a room with cracks and the walls of which was held by some metal contraption. I wouldn't be surprised if this ends up being an undercover brothel
Razilon is correct — the way the credit card company is reported to have responded it does not sound as if they said rebook just for the charge to be rerun.
I have had charges initially blocked when doing card not present transactions with overseas merchants. Once I verify the transaction I check with the merchant to see what they are doing.
And perhaps making travel plans at 2 am is not the best strategy.
And you are dealing with someone in Turkey who is likely not a native English speaker either so the “gun” comment could just be faulty English or translation. You may have been polite but to another non native English speaker there may have been a lot lost in translation and they did not think the request was polite or honourable.
And prostitution is legal in Turkey since the days of Ataturk and there are licensed brothels — just as there are in parts of Nevada. What one thinks of that morally is another issue but it is not a crime in Turkey.