Deliveroo complaint: Non notification delivery of food according to instructions – Now missing

I have been ordering from Deliveroo since it’s inception. The instructions are press RING – in order to us? Leave – “MUST CLOSE GATE”. This always works as we run out to collect it ( my daughter is newly brain injured so Disabled) Yesterday food not arrive at roughly specified time I started to chase it up. On reviewing the video about 1015 minutes after .. I see the driver arrive, not even enter our address property or ring the Video bell, but simply dump it on the public pavement!!! Of course this was an invitation for anyone on the busy pavement to help themselves? I approached Deliveroo they take no responsibility whatsoever simply keep dismissing me in all my calls many many emails! I need them to respond so I can escalate it outside for a satisfactory outcome. I merely asked them to reorder our lunch ensure instructions were followed for successful delivery – refused over over over! I am NOT going away, in particular because this really affected, upset really disappointed my disabled daughter!