>"Admittedly, I was being a bit of a dick by adding the "wtf" at the end..."
This may explain, at least in part, the nature of the response that the OP received.
This may explain, at least in part, the nature of the response that the OP received.
But as the service provider it's your responsibility to maintain a professional tone. When I get what, at best, are difficult customers, my approach is to be tersely polite. Then half tend to back down and be apologetic, the other half I never hear from again.