So I too cannot upgrade my package via the web ...
Oops! Something went wrong.
Sorry, we’re unable to change your package online.
I tried the online chat and got bounced between 3 different people before I simply gave up.
It is not acceptable to roll out excuses for this error being tied to accounts that have a 'special deal' in place. As far as I'm aware I have a standard broadband-only account.
What I want to do is to leave Sky and take up the VM Oomph bundle i.e. give VM more money! Why should this be so difficult to do online?