I think he would have taken care of the issue if you had provided the jacket for KW to confirm the mistake. When a pair of pants came back much slimmer than my prior versions, I had to send everything back for KW to measure and confirm the mistake. In the end, KW did right by me and ordered me a new pair of pants with the correct measurements.
I'll definitely take the blame for not doing the measurements that were asked of me. I was pretty frustrated tho I couldn't just send it back to Aaron