Promise to reduce first bill with Talk Talk early cancellation fee

Hi,

When I signed up I was promised that my first bill would be reduced by the Talk Talk early cancellation fee, so in other words they would pay it for me. I told the customer adviser who signed me up the amount of the early cancellation fee who said she'd deal with it and take that amount off of my first bill. Just checked and unsurprisingly no discount. How do I actually speak to someone about this?

Also signed up for Volt. Already an O2 customer, got sent a new SIM. I'm now paying for two mobile phone contracts and trying to get my old contract cancelled and phone number moved is impossible. I've spent HOURS in online chats all for nothing to happen.

Any help much appreciated 😃