Not really on the ball or dependable

Placed an order with them. Yesterday I received a notification that my order has shipped. Only today to see a note that, the couriers can't locater them to pickup the parcel. Phoned them, only to hear...oh yes they moved and they forgot to update their address with the courier company. Asked them so what would have happened if I did not phone (getting hold of them is a mission in itself), he just said he doesn't know