I avoid contact with unfamiliar people as much as possible in general. Obviously I'm sociable with friends, friends of friends, colleagues and the like, but dealing with strangers makes me nervous tbh. I'm pretty shy and entirely lacking in assertiveness so I find it a lot easier to stick to email as much as humanly possible. It's not like QVC customer service (in my experience) is remotely good, I've had loads of aggro with them, so it's a bit less intimidating to sort it out without having to physically talk to them.