Aject (Pty) Ltd
Rude

I have no idea how the company got a hold of my number, but whoever works their landline phoned me, and the conversation followed:

Me: Hello
Them: Hello?
Me: Can I help you?
Them: ... *click*

Thinking, okay it's just a wrong number but they phone me again seconds later. This time the conversation went this way:

Me: Hello.
Them: ... *click*.

What a rude bunch. At least apologise for having the wrong number and the inconvenience caused.