I hate to be called, I prefer to receive an email and check it when I have time, yet many companies seem reluctant to use email and prefer to disturb me over th

I hate to be called, I prefer to receive an email and check it when I have time, yet many companies seem reluctant to use email and prefer to disturb me over the phone. Sadly for me I have ended up developing a (really) defensive stance, because most of the calls I receive are "spam". Don't get me wrong, I don't mind receiving a call when something that really requires my attention happens.