Have a look at the nozzles, if you use them again.
If you can use the nozzle and click a small "latch" underneath onto a "hold back bar" and this allows you fill your tank without holding the nozzle then the site is in breach of its licence conditions. The only sites that can have this holdback device in uk are those where somone comes from the kiosk and fills your vehicle for you, not to many of them around these days.
Depending where you live and who is the Petroleum Licensing Authority then they are the people you should make your concerns known to. Most Metrolpolitan Boroughs are licensed by the local fire authority so a check on their website should identify if they are the ones you want if not it will be the local HSE.