Deliveroo complaint: Compensation

We ordered through the app from KFC – Brook Retail Park, Clacton, Essex

After over an hour wait we called deliveroo who advised us that we could request a full refund online using the app as it was an exceptional long wait. I did this and nothing happened. When I called again after an hour and a half they asked me to call the restaurant directly which I did. When I spoke to someone they said that they were waiting for the driver when in fact on the app, it said the driver had been there for over 30 minutes and the food was still being prepared. After what was coming up for now 2 hours our food arrived and the driver – Paul who was very apologetic and agreed with the terrible service said that he had been waiting at the restaurant for 30mins! After he left we opened the delivery and we had been given a completely different order, things were missing, other things had been provided and it was cold and spilt! I called the restaurant AGAIN and told them a lady told me if wasn’t her fault the order was wrong even though on the bag was my original receipt with all of my order listed. So I am confused as to understand why this isn’t someones fault! She told me she couldn’t do anything about it and I need to take it up with Deliveroo. So, I call back again and they told me to make a complaint through KFC and deliveroo. I went on to the app to try and resolve it and was given £3.24 on to my deliveroo account! This is awful! I then had to drive back to the restaurant to try and speak to someone! I would like a full refund into my original payment. I placed my order at 14:42. It arrived at 16:50!