I need help controlling a bad habit

I get very nervous when my phone rings. Usually it's my Dad calling me. Lately he's been calling me almost every single day to check up on me and it bothers me alot. Sometimes the phone calls have not been pleasant. He got mad a me over the phone a few times.

Now, I have this bad habit of silencing phone calls in the hopes that I won't get calls from Dad. But this gets my mom frustrated because she called me once and got angry that my phone is off. I don't know how to control this habit that I have. Please help