This is really, really easy.
The PCN is from 2022, and you were made bankrupt in February 2023, so it's not your debt any more, it's a debt of the bankrupt estate.
I suggest you call Marston Recovery, explain that you are bankrupt, and offer to send them a copy of the bankruptcy order, and that will be the end of the matter.
If a bailiff turns up at your house, just show them the bankruptcy order and they will go away.
Don't bother filling any an N244 or spending any more time or money on this, as it would be pointless and unnecessary.