They even cited that the charge was for "mining fees." Are you kidding me? Mining fees for USDT. In short, I rushed to the live support, and we had a very heated argument that later made them apologize.
You probably won the argument because they understands the legal count charge as the case maybe if that was a centralized exchange you used.
They can't be afraid of the lawsuit with that small amount of money. Who would even dare suing them because of that small amount?

Besides, they did it innocently/ignorantly, so they have nothing to fear.
We're talking about reputational criticism here which I'm believed that a slight shit can ruin it all.
You also think you've been the only victim?
-snip-
Stop sounding as if you know better than the victim, the main gist has been passed, which is also in the title of the thread. Can I even call myself a victim? No! Because what I enjoyed with the 0 USDT fee they later set my withdrawal fee to is way more. Besides, I was never charged that 8 USDT, I stopped the transaction immediately.
Also, I speak for myself, and about my experience the way I like it to be done, anyone can come out to speak theirs of any company the way they want, so you can't force me. This broker remains my top-rated broker till today, and my withdrawal fee issue with them has been resolved even more than I wanted it, and has overhauled its entire crypto funding a few months after the episode, so what else do you want? I've put the past behind me.