Selling expired goods

On 11 June 2023 i bought chicken cream pepper pocket to prepair for my sons birthday on 14 June 2023. Well today 14th his birthday i took it out to make in my airfryer with chips. However the whole kitchen had a terrible smell only to realise it was the peper chicken pockets. I checked the sell by date which was 23 March 2023. I took it out immediately and had to go buy take aways for his birthday. Pnp penfords nr is also only ringing so its non existent. Selling food which is expired is not exceptable. Also when i bought my goods there were only 2 cashiers helping and there were long queues. I really am not impress with pnp after the new renovations.