The phone can be tough for some people for sure. It's not what you want to hear, but taking these phone calls is going to be good for you in the future. I know because I went through something similar 7 or so years ago, when applying for college, I had a crazy amount of items wrong with my applications, so I was taking at least 8 phone calls a day for about 2 weeks. These calls did NOT go well. But I forced myself to get through them and it was good practice for me. I still get slightly nervous when taking calls today, but I credit the practice I got in those two weeks to me being successful on the phone today. Stay strong homie