OK. We are trying to help you here. First of all, please get out of your head that any "offence" was committed. An "offence" relates to a criminal matter. This is a "civil" matter.
Do you still have the recipe or evidence that you did pay for the parking at the time?
Do you have a hearing date yet? If not or it is at least two weeks away, you can still submit a Witness Statement and even a skeleton argument. This can be prepared once you answer all the questions raised.
You have still not provided answers to all the other questions we have asked.
We asked you to give a possible explanation why you think you did not receive the N1SDT claim form. You state that you received a Letter of Claim (LoC) from DCB Legal (not the same as DCBL). Did you receive the LoC by post or was it as an attachment to an email?
Have you contacted the CNBC to find out if the N1SDT claim form was sent to the correct address? Also, whilst on the phone to the CNBC ask them to email to you the Particulars of Claim (PoC). Wait on the phone until you receive the email.
You can be waiting for a long time on the phone to the CNBC and I suggest you make the call at 8:30am to reduce the chance of a very long wait. However, you MUST get this information. Address of the defendant and the PoC.
When you have these answers, come back and tell us whether the claim was sent to the correct address and post the PoC here.