Terrible marking

Hi everyone I'm a student at unisa I'm not happy with the way a person called admin user mark my assessment, the person has been giving me only 60s on assessments and when i check the assessments you will find out that i got 80%+ this is annoying me on a serious note, the person is marking for the sake of marking, it's like the person is doing guess work, the person is a terrible marker, please may the person called admin user not be handed my script coz the person does know what they are doing I hate the person