When looking for a replacement hub, would recommend you take a x2 pronged approach
Note down your troubleshooting steps you have taken and observations. Dropped WIFI connections is a tad vague, you need to highlight to the support team your troubleshooting steps... for example that your home router is unreliable and list the reasons why you believe it to be so. If all devices you use to connect to the virgin hub are experiencing the same problem... mention it!
Insist because of the above observations that the provided router is faulty and that you want a replacement sent to you
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal?
But there are people who have the scene to tell them that something is wrong with their particular piece of equipment. I personally think that the latest update to the router has done a great deal of damage to the wireless signal, which incidentally it was supposed to inprove?