I totally agree with Dunderhead... I am in almost exactly the same situation...
I received the letter... and now I have my bill showing that the BB L Upgrade Bonus has been removed.
Plus the bill has £4.50 bundled offers fee?
The other discount I was getting was a 3 for £xx price, in my case XL TV, Phone with weekend free 01/02/03 etc calls at weekends plus XL BB and a V+ box.
The Virgin service is pretty good generally although I have just done a speed test and only managed the following which is pathetic for a so call 20mb service..
I'm going to call retentions in a moment...
I am not sure what I will do if they don't budge..... I am not bothered at all about TV but the V+ box has been useful (if a little unreliable). The Sky HD box seems stupidly expensive... with a £250 up front purchase.
I do need a fairly quick broadband service... mainly upstream so I am tempted by Be There Pro... which for £22 is a bargain. Their service is excellent too, I use them at work. On top of this would be the £130 rip off fee to BT for a new line, plus the £10 or so rental a month. Even without the discounts Virgin doesn't seem so bad afterall.... I think I will down grade to L BB though as I have never acheived anywhere near 20mb.