Bad service

Tonight I went to nandos wonderpark drive through at about 19h11 as I normally do every week I am not happy with the service I got tonight I bought 3 pap and I requested to be served with 3 quater legs as we enjoy their legs but to my surprise they started to give me attitude and I was told that I will have to wait for 20 minutes which I didn't have problem but as I waited 7 cars from drive through came in and out and customers went in and out as I was parked directly opposite to the door then I decided to go in inside I asked why I was waiting for 45 minutes while I was told to wait for 20 minutes and I was told my order was not ready then I asked about 7 cars that went out while I was waiting for 3 quater legs again I was given attitude then I told them that I was going to lodge a complain and write to hello Peter then I went to my car to my surprise just before I opened my car the other kind lady brought my order so I feel I was done deliberately because I asked for 3 quater legs