Project Rejected

I have completed my project on 3rd april and the submission date was 4th(IMDB movie analysis), I have not copied and it is rejected due to too much plagrism, and its showing to submit before 4th to get accepted how can i submit a project on 4th if today is 9th. I have submitted on 3rd and it got checked today, isint it unprofessional and now its saying that it has plagrism, i have asked a doubt redarding submission got no responce, whatsapped still not no response, how it is not wrong from your side.