You need to call the CNBC first thing in the morning on 0300 123 1056. Be prepared for a long wait but calling early in the day is likely to lead to a faster response.
When you get through you must ask them for the details of the claim. Did ParkingEye issue the claim themselves or were they represented by a solicitor? What address was the claim sent to? What was the issue date of the claim?
Whilst on the phone, and this is particularly important, you tell them to email you the Particulars of Claim (PoC).
AS above, if the defendant (your step daughter) has not changed address and it is correct on the V5C and the original PCN was received as a postal Notice to Keeper (NtK) it is unlikely that the claimant (ParkingEye) has erred. Something is not right and for so many pieces of communication not to have been received is not right.
Once we get to the bottom of why the defence was not submitted, we can look at whether an application to have the CCJ set aside is worthwhile. Time is of the essence. If the CCJ is not paid in full within one calendar month of the judgment (the date we do jot know because we haven't seen the order) or set aside, then your step daughter is going to be in a lot of financial pain for the next 6 years.
As soon as you get the information from the CNCB, let us know.
