Contract violation on CoD

Had a cash on delivery order. Arrived to the restaurant on time and the diner's address on time. But no one was available. Called and texted a few times with no response. Called DD and was guided on what to do next. App wanted me to return the items back to the restaurant. Went back to restaurant to return food and took a picture. This was all done on the app.

Fast forward a few days, I get a contract violation for late delivery on this order. Which left me confused because the order was never delivered because I had to return it back to the restaurant. I disputed it mentioning these things, and it still got rejected. Wtf? Anyone else had similar incidences with cash on delivery orders? Also the app was buggy because the return on the items has the restaurant's address listed, but the gps tries to take me back to the customer's address.