Why is it so hard to activate a replacement for a lost phone?

I don't understand why activating a replacement phone must be made so difficult. My daughter lost her phone, which is on my account. The next day, I suspended the device on Xfinity. We ordered a replacement phone, which arrived yesterday morning. I called Xfinity yesterday, and after long periods on hold was forwarded to the fraud department to get the old/lost phone released from fraud watch. I then was told the phone would be working within hours. Today, it is not working. The line still shows as "Suspended" on my account.

Today, I again spent a long time on the phone with an Xfinity representative. Again, I read the long numbers associated with the phone. Again I was on hold for long periods. This time, I was told it would be 12 to 24 hours for the new phone to be activated. It was as if the conversations from yesterday never happened. And now I have little expectation that anything different will happen by tomorrow. Even if the phone is finally activated, a customer should not be put through this ordeal. I am disappointed in Xfinity.

Update 26 hours later: And, NO, Xfinity still does not have my phone activated. Two days of sickeningly sincere promises..."Do not worry. I will have your issue solved. You will have cell service...<blah-blah>." And now the second day of broken promises.