MacBook Pro Intermittent internet connection
I had a very similar question to this which I answered.  I believe the OP ended getting a "version 2 Superhub" from Virgin which solved his particular issues.

Check this out:

Wifi Keeps Dropping Macbook Pro 13in Retina Early 2015

You also want to check how crowded your Wi-Fi is.  When you view all the wi-fi networks in your area, how many show up?  The more networks, the more traffic, and the more issues you are going to run into.