Normally people from DT will be reasonable if they gave you a false-rating. Try to talk it out with that member and see what they're willing to do; if you truly think it's unwarranted then you can make a thread in Meta to complain!
Wrong. Now stop talking, chump.
I've seen it happen on multiple occasions and I'm simply offering the easiest solution. I can't say that an attitude like that would assist in getting any -ve reputation removed, but to each his own.
They're not on DT for
no reason, and 99.99% of the time they don't -ve for
no reason either.
Just trying to help, and normally de-escalating the situation is your best option.