Made an appointment to take my 2013 Ford F150 in f...

Made an appointment to take my 2013 Ford F150 in for a noise that appears at 45 mph or so. Dropped of truck 8:30 on Wednesday morning. Thursday was informed the noise could not be heard. Service tech, and I, took a ride (early Thursday afternoon) for me to identify the noise. The tech agreed he heard the noise, and thought it was wind noise, maybe rear window. Had to pick up the truck Friday afternoon. Best I can tell - NO WORK was done. NEVER heard what was done, or what had been ruled out as causes. Customer rep said he would call. He didn't. I had no truck for 3 days, and have no idea what was done, or not done to fix the problem.