Have you checked the 'Check Service Status' at the top of the page ?
If nothing is showing try phoning 0800 561 0061, this will tell you of more local issues that may be affecting the area. Be aware that it isn't a manned line.
Go round all the accessible co-ax connections and ensure that they are finger tight.
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
All four of your Upstream Channels are running at 16 QAM, they should be 64 QAM.
You can contact VM to report the problem using ...
Text service on 07533051809
150 from Virgin landline.
0345 454 1111 from any other UK phone.
The best time to call is weekdays 08:00 to get a UK agent, anything after 10:00 you must realise that you are quite likely to get through to an offshore agent that doesn't speak English as a first language.
Or you can wait on here for one of the VM Staff to pick up the thread but this may take a few days.
Sorry to hear about your connection drop outs. I've found your details using the information we have on here and can see that the QAM for your upstream are at 64 for all of them. I've checked the rest of the network details and everything is fine and within range. Are you still having problems with your connection? Please let us know if you are so we can take another look.