When you send an a query through a e-mail query form set up on a companies website and they don't ******** respond!.
I mean, whats the point of having an enquiries link on your website if no bothers to either read them or respond to them. It really, really ****** me off!.
In my opinion, if you (as a company) have an e-mail enquiry system then you should be providing some kind of response within 2 hours, even if it is just to say we need time to get the information and will respond fully later. I don't find an automated response much use either, but at least that acknowledge receipt of the enquiry.
<end rant>