@Ed26 what's your connection to the registered keeper please?
You've shown as an informal rejection from October followed by a notice to owner from November, the notice to owner clearly spells out that it must be challenged or paid before the end of the period of 28 days from the date of service or else the right to appeal is lost and the charge can go up by 50% to £120. It's now March 2024, so that was four months ago. What's happened since?
All I can see on the council website is that the charge has gone up to £120, this indicates a charge certificate has been served.
The possible explanations for this are:
1) The notice to owner was not challenged
2) The notice to owner was challenged and a formal notice of rejection was issued, but that formal rejection was ignored (i.e. the registered keeper did not pay or appeal).
Of course if a challenge was sent by post but never received by the council, or if a notice of rejection was never received then we can still fix things, but you need to help us work out what scenario we're dealing with.