Hi Ast85safe,
Thanks for taking the time to contact us via the Community. It's lovely having you on board with us in the Forums. ⭐
We're sorry to hear you've had some issues. If you've renewed online through My VM or via an email offer that was sent to you, once you've agreed to the terms and conditions, these orders go to a back office team who apply the deal. This can take up to 14 days to process and they'll send you an email confirming the change has been made. As these offers are online exclusive, the Sales or Customer Services team won't have visibility of them. As you've called right away, they wouldn't have been able to see the pending change.
In terms of a cooling off period, this is only given if you've agreed to a new contract term. If you have, then the customer services team can roll back the change as long as you're within 14 days of the change being made. Doing this will revert the contract back to what is was originally with the original minimum term date.
We're not able to roll contracts back via the Community I'm afraid so you will need to get in touch with Customer Services. You can reach them by calling 150 / 0345 454 1111 or via WhatsApp on 07803089684. Replies aren't instant and can take a few hours but it allows you to get on with your day whilst waiting for a reply.
Many thanks,