I'm assuming you have reported the issue. If not, please do so, as your equipment is rented & free callouts are part of the service. If the issue is only affecting your installation then Virgin will have no idea you have problems, as they do not monitor individual connections.
Cable customer since 1993. Services: FH TV, Sky Sports & Movies (2xV+), Talk Unlim Telco, VIVID 100, Virgin PAYG Mobile