so my assumption that only what i listed is what i am due to pay is correct?
(the t+cs you posted clearly say:
If you have ordered the services online, by telephone or from an agent attending at your home, and have entered into a new contract, you have the right to cancel those services within your 14 day cooling off period. You can cancel immediately during this time without having to pay an early disconnection fee.)
ALso, "If you are leaving during your cooling off period, you may not be entitled to Early disconnection fees" is a really weird way to word that sentence...
do you mean "If you are leaving during your cooling off period, you will be entitled to the Early disconnection fees not being charged"?
Yes it is all very badly worded.
In your case the important thing is this, if you exercise your right under the 14 day cooling off period within the next couple of days, then you revert back to whatever contract terms you were on before upgrading - incidentally, upgrading in an attempt to 'fix' an existing issue, never, ever works!
What was the status of your prior contract, were you outside of the minimum 18 month period and hence paying the full costs?
If you were safely outside of the 18 month minimum period then what you could do is immediately call VM and request to revert back to it now, citing the 14 day cooling off period. When that is all sorted, then call them again and give them the required 30 day notice that you want to cancel and make arrangements for an alternate provider - you need to carry on paying for the 30 days (plus sometimes a little more depending on the billing cycle dates, but that gets refunded), but after that it's done, no EDF.
On the other hand, if you still had some months left on the minimum period, then you do the same as above but would be liable to pay the EDF.
However, if you don't cancel the upgrade before the end of the 14 days, then that will start a new 18 month minimum term and if you then want to leave, you'll get hit with the full EDF costs of £288.