I'd ask Vm to explain why calls (that you didn't make) were allowed to connect during the period of soft disconnect. That in itself shows there is a problem. I'd also write to
Complaints,
Virgin Media,
PO Box 333,
Matrix Court,
Swansea.
SA7 9ZJ
Or you can fill out a complaint form here
https://help2.virginmedia.com/assets...intformCZ.html
and submit it.
I'd probably do both. If you get nowhere contact Watchdog or someone similar.