Uber Eats complaint: Order never arrived

I have ordered a food on 28-12-2021
Theborder was £40.60
The latest time for the food to arrive was 8:15 pm.
First of all the order was picked by 3rd driver as first 2 driver cancelled the delivery.

Then i was keep tracking the delivery driver he never came to drop the food. I was over the phone and he was telling me that he is coming he is coming. But he never came. He crossed our street and problems turn on the time of 7 minutes of 7 minutes. He was with me over the and still he uber eat was sanding me notifications that driver is trying to contact me. I also told him that if you are unable to fine the address then let me know so that i can come over and pick the food. But then he hang up the phone and completed the order without delivering the food. I immediately tried to contact the driver through uber app bit he phone was on voicemail. I have made many Enquiries but did not receive any response. I have explained all the situation to uber eat help but they said the driver follow the requirements and waited 7 minutes and completed the order.
I was standing outside my door for more than 20 minutes but have not seen a driver to deliver the food. I want my full refund as soon as possible.