Unable to transfer phone numbers or get in touch with an agent

I have had the most frustrating customer experience imaginable.  I'm trying to transfer my phone number from Xfinity to a new service provider with a different device.  An Xfinity service representative told me that I had to cancel my mobile account before I am able to transfer numbers, so I did.  Then, the new service provider told me that they weren't able to transfer to my old number, and I did some more research and found that I was given the wrong advice.  I needed to keep my mobile account for the phone number transfer. 

I can't get in touch with a service agent on the phone because they 'encourage me to seek help' with the automated assistant...and when I log into my account to request help from the automated assistant, they try to call the phone number that was cancelled.  Very frustrating, I'm about at the end of my rope.  Now, I'm trying to start my service back up again while keeping my old phone number so that I can transfer numbers and then cancel again.  Hopefully that number is still available - I have a lot of accounts that require that phone number as authentication, and it would be a huge pain to have to change those.  Does anyone here know how I can get ahold of someone from xfinity to resolve all of my issues?  an email address?  phone number? anything?