Did I brick it?

I received my Rev D in the mail today. I was following the setup instructions. Downloaded the latest Arduino IDE. Downloaded the Teensy add on. set the device to teensy 3.6. Set the com to com19 teensy. Started to upload the audio pass through and it seemed to take forever. The computer beeps like I had unplugged the USB cable. The upload failed. Now I can’t even get the computer to assign a com port when I plug it in. I beeps, but there is no new com port in devices. What do I need to do now? Thanks!

Well, it turns out I ordered and paid for a Rev D, but actually received a rev C. WTF?

OK, they did the right thing, sent me a rev D and a return label for the rev C.