I do exactly the same. If I haven't agreed to a time in advance (and I usually haven't), then my phone notifications will be off. I can be reached any time of the day via text or email, but an unsolicited call is out of the question.

When companies insist on only contacting me directly via the phone and expecting an immediate answer; yet forcing me into a labyrinth to talk to a stranger when I need to contact them: Why would I ever agree to this horrible one-way street?