Mom likes to call me when she doesn't answer the phone. She said it was inconvenient. She calls when she can, but she keeps calling. What should I do?

The poor inherit the wind. The people who care about you the most and love you the most are your parents. Mom called you to know where you are. What are you doing? She was more worried when you didn't pick her up, so she kept calling. Maybe it's a way to keep you from accepting it. You should find an opportunity to communicate with her, let her know that you have grown up and can guarantee yourself, let her not worry too much, and let her believe you. Slowly, she may or may not change.