Can I take a guess the supplier has 'warehouse' in the name?

Given the BS I got when they decided to substitute my last order, followed by ignoring emails, and the person who'd have to deal with the problem mysteriously never being in when phoned and never phoning back, I now refuse to deal with them.

I've still got 20 metres of round bar lying in the workshop as a reminder, which I've got no use for, because you can't make a 15mm diameter part out of 9/16" bar, which is apparently a perfect substitution for 16mm...