Broken 6-sigma and bad quality of FedEx service – FedEx Mobile Review

I have very bad experience in my package delivery last 3 weeks. I used this app for another shipping but I am jot sure if this bad experience came from app or FedEx service. The driver never came last 2 times but the app said they did. Apparently I was home on weekend. Also their re-routing took a week, and this app said pickup pending. But that was 7:15 pm and they closed 7. No office hr displayed. So I did not get that. And yesterday I have another pending notifications and made a call. The office lady said she left a voice msg. But I did not get any. I check my phone but none. What is going on?
Review by nicepat on FedEx Mobile.