Hello Nuala,
I'm sorry to hear that your issues are adding to the bad experiences of others. How many bad experiences against good ? Only VAG would know I guess.
Not that it will be any consolation to you, but the thought of having to take a car of mine in for a so called update, would lead to many sleepless nights. Thanks, but no thanks for a free update!
Now I'm not sure how this will be received by the administrators of this forum - but it's only a personal opinion of what I would be tempted to do if it were mine - I would formally write the to the dealer principal by recorded delivery letter and register my dissatisfaction as a result of this upgrade and inform him that I intend to present the facts of my discontents to the media, since I understand that mine is not an isolated bad experience following these updates. Tell them that I propose to do that within say seven days receipt of the letter unless I have the car returned to me ( with no expense to me) in the same performance mode as it was before I was asked to return it for this upgrade.
Still not happy after this? Then it would be the national press for me.
I must emphasise that this is what I would do if it were mine, and not necessarily a recommendation for what others should do, but I could be something to think about.
I can only wish you well in your quest to right the wrongs.
Kind regards,
Gareth.