So as I understand it you had signed up for the special 1MB £9.99 deal which will revert back to the normal price at some later predetermined date.Ok got that.
Then you got this email saying that for £7 on top you could upgrade to 2MB.
Trouble is I read that email as a generic email that gets sent to everyone(?) and will not apply to ongoing special deals because it is a special deal already..I think even NTL are not going to offer more than one special deal per household.
I can hear NTL's T&C getting a swift redraft just in case..
Also beware, sometimes these email are only for certain areas.This happened to me when nthellworld.com still existed and the famous/infamous CJ got me a special 128k trial because the email offer should never have been sent to me in the first place as it wasn't applicable to my area.
So maybe if you are disappointed someone might do the same for you.