Who was driving is irrelevant.
So you need to somehow track where the first PCN would have gone. five months seems a very long time for the original PCN to be cancelled and a second one served to you. But the periods are based on 28 days, so 28 days to serve the 1st PCN, then 28 days for a response, then council consider reps, and cancel 1st PCN, then 28 days to serve a new PCN. It all adds up.