How would that be possible, if my parking ticket was legitimate reason
It doesn't matter, the law says that if the council makes an excessive demand for money then the PCN must be cancelled regardless of whether it was rightly issued in the first place.
The first step is to make an out-of-time application to the traffic enforcement centre to get a revoking order, as the council has closed the case they are unlikely to oppose it.
Once the Traffic Enforcement Centre has issued a revoking order the council is required to refer the matter to the Traffic Penalty Tribunal, where the matter would be dealt with as an ordinary appeal and as pointed out above, you have the council's admission that the charge certificate was served in error, so the appeal would be allowed on the ground that the penalty demanded exceeded the amount due by law.
These are the documents you need to file with the court:
Form TE9:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1094491/Parking_TE9.pdf (you will want to tick the box for "
The penalty charge has been paid in full")
Form TE7:
https://assets.publishing.service.gov.uk/media/62bebaeee90e073f56752a86/TE7_0622_save.pdfForm TE9 is just a tick-box exercise, but form TE7 is not, so we need to help you with the wording. As a starting point (and to save me reading back through a six page thread), did you ever get to the bottom of why you didn't receive the charge certificate or the order for recovery? Is the address on the notice to owner 100% correct? and have you have any issues with post being misdelivered?