Assuming there were no kerb markings preventing you from parking with your blue badge, you will have to follow the appeals process outlined on the PCN.
If the PCN was issued by the local authority it’s usually a pretty quick and simple process. If it was issued by a third party operator it can be more difficult. It took us over two years to get a PCN from a motorway services overturned.
If I seem a little strange, that's because I am.
Skoda Karoq SEL.