Xfinity Mobile Activation takes 2 weeks

Hi,

I've recently moved to Xfinity Mobile. One of the lines transferred without any problem, while the other one (from AT&T) has problems with the transfer.

The transfer takes already 2 weeks, and I've been charged for the activation fee, and my future bill reflects the line for the unactivated device. I've called Xfinity Mobile several times, talking with tier 2 (and probably 3) representatives. The problem they face is that on the transfer system, MDN shows as non-active. Two representatives even called AT&T to confirm that the line is currently active. 

So, I am not sure what even do. The Xfinity reps give me promises that the line will be activated, which never happens. I think I already spent 10 hours talking (waiting in line) with Xfinity, and the situation is still the same. I've asked one or two highly qualified reps to call me back the next day to confirm that my service gets activated, but nobody called, so I have to repeat all the steps.

I am not sure what to do and where to write. What should I do in such a situation?

Very disappointed with Xfinity Mobile support so far. I am facing a problem bringing my device, and the customer service doesn't even care about me.