Xb10 availability

I talked to Xfinity online and they told me that the Xfinity store would either have the xbo10 modem or would be able to order it for me. When I get to the Xfinity store, they tell me I can’t get xb10 because my neighborhood needs to be upgraded to the same upload/download speeds. Is this true? I’ve never dealt with a company with as much miscommunication as Xfinity. The Xfinity people that you talk to online don’t know the same information as the ones that work in the store. Not sure how this company stays in business. I’ve been trying to get an xb10 for over a year. Supposedly it’s finally out. But very hard to get. Anyone know how to get one? I have the fastest plan available. And was told that’s what you need.