Council Roads Planning?

Recently I sent a birthday package to my grandmother. After she didn’t receive it, I called the courier company who said that they couldn’t find her street on any maps. Indeed after checking, her street isn’t listed on any maps (including Google maps). I contacted her local council, who sent me a map of the area stating the street was included. After looking at the map, it is actually missing (the street leading to it is there). I am worried an ambulance won’t be able to find her in case of emergency. My question is who is responsible for this? Is it the council? I mean she pays rates!