"Was told 1-2 hours when it was 4 hours"

My appointment was at 8.45 I got to the hospital for 8.30 . On my appointment letter it stated that it could take upto 1-2 hours so that was ok as I was told about it , my name was called and I was put into a room where I was asked to undress and put a gown on 20 minutes later I was still sat in the room they had miss placed my notes so no one knew I was there buy the time I was seen two people had gone before me . At 10.55 I had everything done and was told my scan was ok just needed for the doctor to see me so it wouldn't be long so that was good as I was due in work for 2pm but no I was still sat waiting at 12.45 that's 4 hours later and 2 hours after my scan and when I went and asked about it I was made to feel that I was in the wrong and that I shouldn't of asked . I feel 4 hours is to long to be sat with out any one coming to say sorry for any delays