Sad some companies are like this.
Just had a terrible experience with Cary Audio and an SLP-05 preamp, wound getting a refund.
Compare to my experience with Manley.
Before I purchased them (used still under warranty), I emailed them to verify the warranty was valid and asked a couple of questions at the same time.
I heard back from sales about the warranty, and got a personal email from EveAnna Herself.
After they arrived with tubes removed, I went to the website only to find they did not post a tube map - I had to zoom in on the image to figure out what tube went where. which was confounded by the fact that my input buffer tube was different than the one they listed.
So I emailed tech support to verify the tube was OK to use, and pointed out they might want to consider adding a tube map to the manual and website.
Got another personal email from Herself telling me that she just updated the website with text descriptions of the tube locations.
Some companies get it, some don't.