More than likely you are currently on a non standard package, so the website has nothing to compare the new deals with. Best course of action is to ring Retentions (150 option 4 then 5. If you don't have a VM phone 0345 454 1111 with the same options will get you there). They will look through your current package & offer the best deal for what you want.
Cable customer since 1993. Services: FH TV, Sky Sports & Movies (2xV+), Talk Unlim Telco, VIVID 100, Virgin PAYG Mobile