Free Traffic Legal Advice

Hello,

I'd appreciate any help/guidance. I've only ever had a yellow PCN before so wanted to check this was legit and that they did everything correctly when sending this letter. I'm not very savvy but it seemed odd to me, didn't say what was done wrong, times etc, it's come from Oxford Direct Services but I'm pretty sure it's a council run car park.. Also it states it's an 'Excess Parking Notice' but when looking online, only results about Oxford come up so are they using a term that they shouldn't be to confuse people?

Photo of letter:
https://drive.google.com/file/d/1J3UxNtMjUKNd3gWz0mZR9D9w7hO9Lkah/view?usp=sharing