Porting Comcast Business landline phone number over to Xfinity landline service

I am trying to port my Comcast Business phone number over to my Xfinity phone service and no one has been able to help me. I have been on the phone several times for several hours, being bounced around from department to department and no one does anything to help. I am very frustrated because when I recently signed up for Xfinity service, I explained that I wanted my number ported over. The rep assured me that this would not be a problem, but it has been nothing but a problem. I have wasted so much time on this issue without any resolution. Almost a week ago I tried chatting with an agent online to help me with this. He said that the number was ported and would be connected in a couple of days. Unfortunately, the result was the same. My phone number is still not ported over. I am at my wit's end over this. I don't know what else to do. The phone service agents and online agents have proven to be extremely incompetent as no one has been able to help me with this issue. I am very displeased and disappointed with my Xfinity service to this point. I'm posting here as a last effort to get help with porting my number over before I out right cancel my service. Is there anyone who can help me get this done or point me in the right direction to someone who can help??