device activation

I have had an absolutely horrible time porting in my new number. My previous carrier showed me PROOF of the release of my old phone number, but Xfinity is still saying that it is their issue. There are multiple reddit posts and complaints of how bad Xfinity is at porting in numbers. I am disgusted with my services and behavior of the representatives that I have spoken to. I've had no other choice but to raise my complaints to FCC - as I have been threatened at work for not being able to use my number to speak to my clients. I am missing work. I have also been informed that I missed an important call from my doctor and I do not have another number to use. This has been a nightmare. I am looking for help on how to get my device activated as soon as possible.