Read message 539 - the common denominator is that Virgin Media made change. It should have reasonably been aware of "power fluctuation" issues with the Hub 5 before rolling them out and informed customers (that Virgin Media forcibly moved from Landline to IP telephony) of the need to purchase new phone systems to be compatible with the Virgin Media hardware/firmware. it did none of this. Instead it made the switchover and subjected us to months of chasing our tail trying to get Virgin Media to accept that this even was an issue.
Now you have the audacity to suggest it is our fault for not getting a more modern phone system. At what point does Virgin Media propose this is an acceptable solution?
You (VM) broke it, you fix it. If it needs a new phone system, you provide it - free (at least that might cover the extreme inconvenience you caused Virgin Media). But no, you'd rather blame everyone else for your inability to provide a suitable service to those you have impacted. Incompetent/Ineffective are too weak descriptions for this response.